Alert Service Bulletin

ALERT SERVICE BULLETIN

September 28, 2005 ASB251A

TITLE

HUBS MANUFACTURED WITH IMPROPER RETENTION THREADS

TO:

FAA-Approved Propeller Repair Stations, Aircraft Manufacturers, STC Holders, Owners and Operators

MODELS AFFECTED

2D34C53/74E-X, D2A34C58/90AT-X, 3AF32C87/82NC-X, D3AF32C87/82NC-X, D3A32C88/82NC-X, D3A32C90/82NC-X, 3AF34C92/90LF-X. Refer to Table 1 for speciﬁc serial numbers. TABLE 1: HUB SERIAL NUMBERS

Serial Hub Model Number Hub Model Serial Number C58, C34, C49, C78, C98 030725 C53 050389 030726 C79, C90 042206 030727 042207 030728 042208 030729 C77, C88 042201 030730 042202 030748 C87 blank index, C72, C93 042239 030749 042524 030750 042527 030751 042528 030752 042529 030753 050071 030754 050073 030755 C92, C74, C86 050866 030756 C87 D index 050934 030757 030758 030759 030760 050403 050407 050408 050410 050475 050477

Original Issue: September 8, 2005 Page 1 of 5 TO OBTAIN SATISFACTORY RESULTS, PROCEDURES SPECIFIED IN THIS SERVICE INFORMATION MUST BE ACCOMPLISHED IN ACCORDANCE WITH ACCEPTED METHODS AND PREVAILING GOVERNMENT REGULATIONS. MCCAULEY PROPELLER SYSTEMS CANNOT BE RESPONSIBLE FOR THE QUALITY OF WORK PERFORMED IN ACCOMPLISHING THIS SERVICE INFORMATION. McCauley Propeller Systems PO Box 7704 Wichita, Kansas 67277-7704 COPYRIGHT © 2005 McCauley Propeller Systems ALERT SERVICE BULLETIN

ASB251A

AIRCRAFT AFFECTED

The following is a list of aircraft models that may have the discrepant hubs installed. The list is not necessarily complete. Because a hub can be interchanged and reidentified as another model with the installation of different studs or adapters, the hub may have been reidentified as a different model. The first hub model listed in Table 1 is the configuration the hub was shipped from McCauley.

OEM Models Beagle B206 Bellanca 14-19-3A, 17-30, 17-30A Bellanca 17-30, 17-30A Cessna 180 series, 182H thru R, 185E, A185E, F, A188B, 206 Cessna 182E, F, G, H, J, K, L, M, N, P, Q, R Cessna 185,A,B,C,D, E, F, A185E, F Cessna A188, A188A, 206 series, P206, A, TP206A Cessna P206, A, TP206A, U206A thru G, TU206A thru F Cessna P206,A,B,C,D,E,TP206A,B,C,D,E,TU206F Cessna U206,A,B,C,D,E,F,G,TU206A,B,C,D,E,F,207,T207 Cessna 207, A, T207 Cessna 210-5, 210-5A,210,A,B,C,D Cessna 210D, E, F, G, H, J, K, L, M, T210F, G, H, J, K, L Cessna 310P,Q,R,T310P,Q,R,320,A,B,C,D,E,F,335,340,A, Cessna 310I Cessna 401,A,B,402,A,B,C,414,A Cessna 411, A, 421, A, B Fuji FA-200-180 Globe GC-1B Hindustan HA-31 Meyers 200B, C, D Mooney M20C, D, G Navion A, B, C, D, E, F, G, H Navion H Procaer F15/C Transavia PL12 Windecker AC-7

ASB251A Page 2 September 28, 2005 ALERT SERVICE BULLETIN

ASB251A

PUBLICATIONS AFFECTED

720415 710930 McCauley Standard Practice Manual SPM100 McCauley Blade Overhaul Manual BOM100

REASON

ASB251A supercedes ASB251 dated September 8, 2005. A total of 40 threaded retention constant speed and feathering hubs have been manufactured with improperly machined socket retention threads. The condition can cause concentrated loading on the threads that could result in hub cracking and blade separation. The hubs were delivered in 2004 and 2005. Instructions provided in this alert service bulletin affect the continued airworthiness of these propellers. McCauley has not yet determined a root cause for the problem and replacement hubs are not yet available.

DESCRIPTION

Alert Service Bulletin 251 speciﬁes the removal from service of affected propeller hubs.

COMPLIANCE

MANDATORY. Within the next 10 hours of operation, all affected propellers must be removed from service. The propeller must be returned to a McCauley Service Center for disassembly and the hub replaced with a serviceable hub. See attachment for your closest McCauley Service Center. NOTE: At the current time we do not have any replacement hubs. We expect up to a 60 to 90 day lead-time to supply replacement hubs. Once available, hubs will be supplied on a ﬁrst ordered basis.

CREDIT PROGRAM:

Hubs not installed will be credited for parts at cost plus associated freight charges when documentation is submitted with the claim by an authorized McCauley Service Center. Hubs that have been installed will be credited for parts and labor in accordance with the following schedule for work completed and claimed by an authorized McCauley Service Center: 2 blade constant speed and feathering hubs: Labor: • 2*** Hours Removal and installation from a Lycoming engine or 1.5*** hour removal from a Continental engine. • 3 hours propeller tear down and clean up, and 4 hours propeller assembly (Add 1.0 hours if feathering hub.) • 1 hour static balance. • 1 hour per blade if deice boot is replaced. 2 blade constant speed hubs - summary • Total Labor 10 hours for Lycoming installed propellers, plus deice boot labor if applicable. • Total Labor 9.5 Hours for Continental installed propellers, plus deice boot labor if applicable. 2 blade constant speed feathering hubs - summary

ASB251A September 28, 2005 Page 3 ALERT SERVICE BULLETIN

ASB251A

• Total Labor 11.0 hours for Lycoming installed engines, plus deice boot labor if applicable. • Total Labor 10.5 hours for Continental installed engines, plus deice boot labor if applicable. Parts: We will provide parts credit for the hub**, seals, O-rings, gaskets, damaged retention nut*, ferrules requiring removal that have reached their maximum number of installations* and deice boots* if applicable, if the parts are ordered through McCauley and a warranty claim is submitted by your McCauley Service Center. *Parts that must be returned with the claim. ** Hub must be returned, with warranty claim reference, within 5 days of removal. *** Requires outside work order to be submitted to the McCauley Service Center to be claimed as outside labor on the McCauley claim. Freight: Documented freight charges associated with shipment of affected hubs will be paid when documentation is submitted with the claim. All freight charges involving return of the hub should be the most economical method available. 3 blade constant speed and feathering hubs: Labor: • 2*** Hours removal and installation from a Lycoming engine or 1.5*** hour removal from a Continental engine. • 4 hours propeller tear down and clean up, and 6 hours propeller assembly (Add 1.5 hours if feathering hub) • 1 hour static balance 3 blade constant speed hubs - summary • Total Labor 13 hours for Lycoming installed propellers, plus deice boot labor if applicable. • Total Labor 12.5 Hours for Continental installed propellers, plus deice boot labor if applicable. 3 blade constant speed feathering hubs - summary • Total Labor 14.5 hours for Lycoming installed engines, plus deice boot labor if applicable. • Total Labor 14 hours for Continental installed engines, plus deice boot labor if applicable. Parts: We will provide parts credit for the hub**, seals, O-rings, gaskets, damaged retention nut*, ferrules requiring removal that have reached their maximum number of installations* and deice boots* if applicable, if the parts are ordered through McCauley and a warranty claim is submitted by your McCauley Service Center. *Parts that must be returned with the claim. ** Hub must be returned, with warranty claim reference, within 5 days of removal. *** Requires outside work order to be submitted to the McCauley Service Center to be claimed as outside labor on the McCauley claim. Freight: Documented freight charges associated with shipment of affected hubs will be paid when documentation is submitted with the claim. All freight charges involving return of the hub should be the most economical method available. All work must be accomplished and a credit claim submitted within six months of the effective date of this bulletin.

APPROVAL

FAA approval has been obtained on technical data in this publication that affects product type design.

ASB251A Page 4 September 28, 2005 ALERT SERVICE BULLETIN

ASB251A

ACCOMPLISHMENT INSTRUCTIONS 1. McCauley Service Center requirements: A. Disassemble the propeller and reassemble in accordance with the applicable overhaul manual. B. Before assembly into a replacement hub, inspect the retention nut threads with a 10 power magniﬁer for any signs of damage including: galling, heavy localized loading, thread deformation, or chipped threads that may have been caused by thread interference in the hub. C. All affected hubs must be returned to McCauley with a warranty claim. 2. Owner/Operator requirements A. Make a logbook entry stating that propeller maintenance records have been checked and compliance with this alert service bulletin has been accomplished.

ASB251A September 28, 2005 Page 5

Service Center Lists www.McCauley.Textron.com

ALASKA: CONNECTICUT: MICHIGAN: OREGON: DOMINION PROPELLER CORP. SENSENICH PROPELLER H & S PROPELLER SHOP INC. * FLIGHTCRAFT INC./PORTLAND * 1101 EAST 76TH AVE, SUITE E SERVICE 6220 G -ROW 7777 N.E. AIRPORT WAY ANCHORAGE AK 99502 WINDHAM COUNT Y AIRPORT WATERFORD MI 48327 PORTLAND OR 97218 TELEPHONE 907 -349 -5942 21 AIRPORT ROAD TELEPHONE 248 -666 -3800 TELEPHONE 503 -331 -4292 TELEFAX 907 -349 -2067 NORTH WINDHAM CT 06256 TELEFAX 2 48 -666 -3524 TELEFAX 503 -282 -2055 TELEPHONE 877 -456 -7944 ARIZONA: TELEPHONE 860 -456 -7944 MINNESOTA: PENNSYLVANIA: OTTOSEN PROPELLERS & TELEFAX 860 -456 -0410 MAXWELL AIRCRAFT SERVICE SENSENICH PROPELLER ACCESSORIES INC. INC. * SERVICE * 105 SOUTH 28TH STREET FLORIDA: CRYSTAL AIRPORT 519 EAST AIRPORT ROAD PHOENIX AZ 85034 AVIATION PROPELLERS INC. * MINNEAPOLIS MN 55429 LITITZ PA 17543 TELEPHONE 800 -528 -7551 12970 PORT SAID RD. TELEPHONE 763 -533 -8611 TELEPHONE 800 -462 -3412 TELEPHONE 602 -275 -8514 OPA LOCKA FL 33054 TELEFAX 763 -533 -3219 TELEPHONE 717 -560 -3711 TELEFAX 602 -275 -8594 TELEPHONE 305 -688 -6030 TELEFAX 717 -560 -4354 TELEFAX 305 -681 -4236 MISSISSIPPI: WARNER PROPELLER & MEMPHIS PROPELLER SERVICE TEXAS: GOVERNOR CO LLC. * PALM BEACH PROPELLER INC. * 11098 WILLOW RIDGE DR BYAM PROPELLER SERVICE 5102 S. COUNTRY CLUB ROAD 2633 LANTANA RD. SUITE #23 OLIVE BRANCH MS 38654 INC. * TUCSON AZ 85706 BLDG 1501 TELEPHONE 800 -844 -7767 4001 N. MAIN ST. TELEPHONE 520 -294 -5671 LANTANA FL 33462 TE LEPHONE 662 -895 -5282 HANGER 7 SOUTH TELEFAX 520 -294 -1114 TELEPHONE 800 -965 -7767 TELEFAX 662 -895 -6061 FORT WORTH TX 76106 TELEPHONE 561 -965 -7767 TELEPHONE 817 -625 -0161 CALIFORNIA: TELEFAX 561 -965 -7933 NEBRASKA: TELEFAX 817 -626 -0009 AMERICAN PROPELLER DUNCAN AVIATION SERVICE * GEORGIA: LINCOLN AIRPORT NE JORDAN PROPELLER SERVICE 20208 CHARLANNE DR. SENSENICH PROPELLER 3601 E PARK RD INC. REDDING CA 96002 SERVICE * LINCOLN NE 68524 103 EAST RHAPSODY TELEPH ONE 800 -292 -7767 1142 AVIATION BLVD. TELEPHONE 402 -475 -2611 SAN ANTONIO TX 78216 TELEPHONE 530 -221 -4470 GAINESVILLE GA 30501 TELEFAX 402 -475 -5541 TEL EPHONE 210 -344 -3064 TELEFAX 530 -221 -5201 TELEPHONE 770 -538 -0444 TELEFAX 210 -344 -9433 TELEFAX 770 -538 -0117 NORTH CAROLINA: SANTA MONICA PROPELLERS PIEDMONT AVIATION R & D PROPELLER SERVICE, INC. * IDAHO: COMPONENT SERVICES INC . 3135 DONALD DOUGLAS LOOP PRECISION PROPELLER INC. * 3820 NORTH LIBERTY ST. 2528 HATFIELD RD. SOUTH 4777 AERONCA WINSTON -SALEM NC 27102 PEARLAND, TX 77581 SANTA MONICA CA 90405 BOISE ID 83705 TELEPHONE 336 -776 -6260 TELEPHONE 800 -580 -7767 TELEPHONE 800 -421 -9995 TELEPHONE 800 -643 -8379 TELEFAX 336 -776 -6261 TELEPHONE 281 -485 -4400 TELEPHONE 310 -390 -6233 TELEPHONE 208 -344 -5161 FAX 281 -485 -3006 TELEFAX 310 -398 -3471 TELEFAX 208 -344 -9503 OHIO: AIRCRAFT PROPELLER SERVICE WASHINGTON: SULLIVAN PROPELLER ILLINOIS: OF OHIO, INC * A.C. PROPELLER SERVICE INC. * SPECI ALIST AIRCRAFT PROPELLER SERVICE 3530 LIGHTNER DRIVE 925 SOUTH NE BRASKA ST. 20995 SKYWEST DRIVE INC. * VANDALIA OH 45377 SEATTLE WA 98108 HAYWARD, CA 94541 290 LARKIN DRIVE TELEPHONE 800 -878 -3999 TELEPHONE 800 -253 -7556 TELEPHONE 800 -782 -0920 WHEELING IL 60090 TELEPHONE 937 -667 -0222 TELEPHONE 206 -762 -1225 TELEPHONE 510 -782 -0920 TE LEPHONE 800 -323 -4130 TELEFAX 937 -667 -3410 TELEFAX 206 -762 -4604 TELEFAX 510 -264 -9162 TELEPHONE 847 -541 -1133 TELEFAX 847 -541 -0176 TIFFIN AIRE IN C. * NORTHWEST PROPELLER COLORADO: 1778 W. STATE RTE. 224 SERVICE INC. AERO PROPELLER INDIANA: TIFFIN OH 44883 16709 MERIDAN ST. E ACCESSORIES * AIRCRAFT SPECIALIST INC. * TELEPHONE 800 -458 -2487 UNIT 3 & 4 9616 JEFFCO AIRPORT AVE. 6005 PROPELLER LANE TELEPHONE 419 -447 -4263 PUYALLUP WA 98375 HANGAR# 44 SELLERSBURG IN 47172 TELEFAX 419 -448 -0064 TELEPHONE 253 -770 -7400 BROOMFIELD CO 80021 TELEPHONE 800 -356 -3723 TELEFAX 253 -770 -7500 TELEPHONE 800 -525 -8756 TELEPHONE 812 -246 -4696 OKLAHOMA: TELEPHONE 303 -469 -1749 TELEFAX 812 -246 -4365 AAR AIRCRAFT SERVICES TELEFAX 303 -465 -1254 6611 SOUTH MERIDIAN KANSAS: OKLAHOMA CITY OK 73159 ROCKY MOUNTAIN YINGLING AIRCRAFT IN C. TELEPHONE 405 -218 -3330 PROPELLERS INC. * 2010 AIRPORT RD TELEPFAX 405 -218 -3620 ERIE MUNICIPAL AIRPORT WICHITA KS 67277 2865 AIRPORT DR. TELEPHONE 316 -943 -3246 ERIE CO 80516 TELEPHONE: 800 -835 -0083 TELEPHONE 800 -462 -7605 EXT# 251 TELEPHONE 303 -665 -7905 TELEFAX 316 -943 -2484 TELEFAX 303 -665 -7164

* Governor Overhaul Shops Revised 06/24/05

Service Center Lists www.McCauley.Textron.com

FRANCE: VENEZUELA: ARGENTINA: CANADA: FRANCE AVIATION * AIRTECH SERVICIOS AEROS HELICES CLERICI WESTERN PROPELLER CO. LTD. AEROPORTDE TOUSSUS -LE - C.A. S M DE ORO 3061 7940 YELLOWHEAD TRAIL NOBLE AEROPUERTO CARACAS CASTELAR BUENOS AIRES 1712 EDMONTON ALBERTA T5B 1G3 CHATEAUFORT OSCAR MACHADO ZULOAGA TELEPHONE + 54 -11 -4623 -5754 TELEPHONE 800 -661 -9948 FRANCE 78117 AIRTECH CHARALLAVE TELEFAX + 54 -11 -4661 -9761 TELEPHONE 780 -477 -3501 TEL EPHONE + 33 -1-39568050 ESTADO MIRANDA, APARTADO TELEFAX 780 -477 -0131 TELEFAX + 33 -1-39561152 POSTAL 2057 AUSTRALIA: TELEPHONE + 58 -2-572 -9780 AIR PROP SERVICES WESTERN PROPELLER -PACIFIC TECHNIC AVIATION * TELEF AX + 58 -1-492 -4242 HANGAR 3, FIRST AVE. LTD Z.E. SAINT -MAURICE MOORABBIN AIRPORT #124 -7080 RIVER ROAD MANOSQUE, 04100 MENTONE, VICTORIA, RICHMOND BRITISH COLUMBIA TELEPHONE + 33 -492 -726648 AUSTRALIA 3194 V6X 1X5 TELEFAX + 33 -492 -878724 TELEPHONE + 6 1-3-9580 -0013 TELEPHONE 800 -663 -7964 TELEFAX + 61 -3-9587 -3757 TELEPHONE 604 -273 -4561 GERMANY: TELEFAX 604 -273 -4812 HOFFMANN GMBH & CO. KG * TENIX AVIATION PTY LTD KUPFERLINGSTR.9 HANGAR 1C, JAMES SCHOFIELD DR. CANADIAN PROPELLER LTD * ROSENHEIM D -83022 ADELAIDE AIRPORT 5950 462 BROOKLYN ST TELEPHONE + 49 -8031 -18780 ADELAIDE SOUTH AUSTRALIA WINNIPEG MANITOBA R3J 1M7 TELEFAX + 49 -8031 -187878 TELEPHONE + 61 -8-8355 -8900 TELEPHONE 204 -832 -8679 TELEFAX + 61 -8-8355 -8922 TELEFAX 204 -888 -4696 MT PROPELLER * AIRPORT STRAUBING - AIRFLITE PTY LTD * LEAVENS AVIATION INC. * WALLMUEHLE 37 EAGLE DRIVE 2555 DERRY ROAD EAST ATTING BAVARIA D -94348 JANDAKOT MISSISSAUGA ONTARIO L4T 1A1 TELEPHONE + 49 -9429 -94090 WEST ERN AUSTRALIA 6164 TELEPHONE 905 -678 -1234 TELEFAX + 49 -9429 -8432 AUSTRALIA TELEFAX 905 -678 -7028 TELEPHONE + 61 -8-9332 -5244 RODER PRAZISION GMBH * TELEFAX + 61 -8-9332 -3189 HOPE AERO PROPELLER & AM FLUGPLATZ COMPONENTS * EGELSBACH -FLUGPLAZ -D63329 AVIATION COMPONENT 2283 ANSON DR TELEPHONE + 49 -6103 -40020 SERVICES PTY * MISSISSAUGA ONTARIO L5S 1G6 TELEFAX + 49 -6103 -400271 BLDG 612, LORES BONNEY DR TELEPHONE 905 -677 -8747 ARCHERFIELD AIRPORT TELEFAX 905 -677 -5935 NEW ZEALAND: ARCHERFIELD, QUEENSLAND 4108 SAFE AIR LTD TELEPHONE + 61 -7-3274 -4500 AVIATION B.L., INC. * BLENHEIM AIRPORT TELEFAX + 61 -7-3274 -4010 600 CHEMIN DES PATRIOTES HANGAR #1 ST. MATHIAS QUEBEC J3L 6A2 BLENHEIM EAST COAST PROPELLERS PTY TELEPHONE 450 -658 -2041 TELEPHONE + 64 -3-5728416 LTD TELEFAX 450 -658 -3982 TELEFAX + 64 -3-5728846 BLDG 641 KLEMM ST BANKSTOWN AIRPORT NSW 2200 DENMARK: NORWAY: SYDNEY AUSTRALIA SCANAVIATION A/S * NORRONAFLY PW&AP * TELEPHONE + 61 -2-9791 -0246 AMAGER LANDEVEJ 147B OKSENOYVEIEN 12 BOX 64 TELEFAX + 61 -2-9791 -0057 COPENHAGEN AIRPORT N-1330 FORNEBU NORWAY KASTRUP DK -2770 TELEPHONE + 47 -67 -539066 WEST COAST PROPELLERS * TELEPHONE + 45 -32 -514222 TELEFAX + 47 -67 -590320 6/10 WHYALLA ST TELEFAX + 45 -32 -511288 PERTH. W.A. 6155 WILLETTON SINGAPORE: TELEPHONE + 61 -8-9354 -411 3 C & A AVIATION (PTE) LTD. * TELEFAX + 61 -8-9354 -4113 ENGLAND: BLDGS 110/143 EAST CAMP CSE AVIATION * SELETAR AIRFIELD 798370 BRAZIL: OXFORD AIRPORT KIDLINGTON TELEPHONE + 65 -4812233 DIAMOND AVIACAO LTDA KIDLINGTON OXFORD 0X5 1RA TELEFAX + 65 -481 -0827 0R AV. SANTOS DUMONT SETOR TELEPHONE + 44 -1865 -844203 + 65 -481 -3239 SANTA GENOVEVA N 1317 CEP TELEFAX + 44 -1865 -379123 74672 -420 SOUTH AFRICA: GOIANIA, GOIAS BRAZIL H + S AVIATION PLACO (PTY) LTD * TELEPHONE: + 55 -62 -515 -9900 AIRPORT SERVICE ROAD BOX 18017 RAND AIRPORT TELEFAX: + 55 -62 -515 -9900 PORTSMOUTH HAMPSHIRE GE RMISTON, TRANSVAAL 1419 P03 5PJ TELEPHONE + 27 -11 -827 -9301 TELEPHONE + 44 -2392 -304000 TELEFAX + 27 -11 -827 -3801 TELEFAX + 44 -2392 -304060

* Governor Overhaul Shops Revised 06/24/05 Multi-engine

Service Bulletin

October 17, 2005 MEB05-8

TITLE

McCAULEY PROPELLER HUB INSPECTION

EFFECTIVITY

The following airplanes equipped with an affected McCauley threaded series propeller hub described in McCauley Alert Service Bulletin ASB251A (or latest revision):

Model Year Serial Numbers 310I 1964 310I0001 thru 310I0200 310P/T310P 1969 310P0001 thru 310P0240 310Q/T310Q 1970 thru 1974 310Q0001 thru 310Q1160 310R/T310R 1975 thru 1981 310R0001 thru 310R2140 320 635 320/320-1 1962 320-0001 thru 320-0110 320A 1963 320A0001 thru 320A0047 320B 1964 320B0001 thru 320B0062 320C 1965 320C0001 thru 320C0073 320D 1966 320D0001 thru 320D0130 320D 623 320E 1967 320E0001 thru 320E0110 320F 1968 320F0001 thru 320F0045 320F 658 335 1980 335-0001 thru 335-0065 340 672, 673 340 1972 340-0001 thru 340-0115 340 1973 340-0151 thru 340-0260 340 1974 340-0301 thru 340-0370 340 1975 340-0501 thru 340-0555 340A 1976 340A0001 thru 340A0125 340A 1977 340A0201 thru 340A0375 340A 1978 340A0401 thru 340A0562 Page 1 of 4 To obtain satisfactory results, procedures speciﬁed in this publication must be accomplished in accordance with accepted methods and prevailing government regulations. Cessna Aircraft Company cannot be responsible for the quality of work performed in accomplishing the requirements of this publication.

Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas 67277, U.S.A. (316) 517-5800, Facsimile (316) 942-9006 COPYRIGHT © 2005 340A 1979 340A0601 thru 340A0801 340A 1980 340A0901 thru 340A1045 340A 1981 340A1201 thru 340A1280 340A 1982 340A1501 thru 340A1543 340A 1984 340A1801 thru 340A1817 401/401A 655 401 1967/68 401-0001 thru 401-0322 401A 1969 401A0001 thru 401A0132 401B 1970/71 401B0001 thru 401B0121 401B 1972 401B0122 thru 401B0221 402 1967/68 402-0001 thru 402-0322 402A 1969 402A0001 thru 402A0129 402B 1970/1971 402B0001 thru 402B0122 402B 1972 402B0201 thru 402B0249 402B 1973 402B0301 thru 402B0455 402B 1974 402B0501 thru 402B0640 402B 1975 402B0801 thru 402B0935 402B 1976 402B1001 thru 402B1100 402B 1977 402B1201 thru 402B1250 402B 1978 402B1301 thru 402B1384 402C 1979 402C0001 thru 402C0125 402C 689 402C 1980 402C0201 thru 402C0355 402C 1981 402C0401 thru 402C0528 402C 1982 402C0601 thru 402C0653 402C 1984 402C0801 thru 402C0807 402C 1985 402C0808 thru 402C1020 411 642 411 1965/1966 411-0001 thru 411-0250 411A 1967/1968 411-0251 thru 411-0300 414 667 414 1970 414-0001 thru 414-0099 414 1971 414-0151 thru 414-0175 414 1972 414-0251 thru 414-0280 414 1973 414-0351 thru 414-0437 414 1974 414-0451 thru 414-0550 414 1975 414-0601 thru 414-0655 414 1976 414-0801 thru 414-0855 414 1977 414-0901 thru 414-0965 414A 1978 414A0001 thru 414A0121 414A 1979 414A0201 thru 414A0340

MEB05-8 Page 2 October 17, 2005 414A 1980 414A0401 thru 414A0535 414A 1981 414A0601 thru 414A0680 414A 1982 414A0801 thru 414A0858 414A 1984 414A1001 thru 414A1006 414A 1985 414A1007 thru 414A1212 421 693 421 1967/1968 421-0001 thru 421-0200 421A 1969 421A0001 thru 421A0158 421B 1970 421B0001 thru 421B0056 421B 1971 421B0101 thru 421B0147 421B 1972 421B0201 thru 421B0275 421B 1973 421B0301 thru 421B0486 421B 1974 421B0501 thru 421B0665 421B 1975 421B0801 thru 421B0970

PURPOSE

To transmit McCauley Alert Service Bulletin ASB251A: Hubs Manufactured With Improper Retention Threads. According to McCauley, "A total of 40 threaded retention constant speed and feathering hubs have been manufactured with improperly machined socket retention threads. The condition can cause concentrated loading on the threads that could result in hub cracking and blade separation."

COMPLIANCE

Mandatory: shall be accomplished within the next 10 hours of operation as described in McCauley Alert Service Bulletin ASB251A (or latest revision).

APPROVAL

Refer to the attached McCauley Alert Service Bulletin ASB251A (or latest revision)

MAN-HOURS

Refer to McCauley Alert Service Bulletin ASB251A (or latest revision)

MATERIAL

Refer to McCauley Alert Service Bulletin ASB251A (or latest revision)

ACCOMPLISHMENT INSTRUCTIONS

1. Determine if an affected propeller hub is installed by reviewing the airplane and propeller paperwork such as logbooks and/or applicable work orders and sales/shipping receipts or visually inspect the propeller hubs.

MEB05-8 October 17, 2005 Page 3 NOTE: Refer to the attached McCauley Alert Service Bulletin ASB251A (or latest revision)

A. If it is determined that an affected propeller hub is installed, proceed to Step 2.

B. If it is determined that an affected propeller hub is not installed, proceed to Step 5.

2. Prepare the airplane for maintenance.

A. Make sure that all switches are in the OFF/NORM position.

B. Disconnect electrical power from the airplane.

(1) Disconnect the airplane battery.

(2) Disconnect external electrical power.

C. Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" writtenonthem.

3. Do the attached McCauley Alert Service Bulletin ASB251A (or latest revision)

4. Remove maintenance warning tags and connect the airplane battery.

5. Make an entry in the airplane and propeller logbooks as applicable that states compliance and method of compliance with this Service Bulletin.

NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for continued airworthiness and must be accomplished for ongoing airworthiness compliance as required per 14 CFR Part 43.13.

CREDIT

Refer to McCauley Alert Service Bulletin ASB251A (or latest revision)

OWNER NOTIFICATION

On October 17, 2005 the following Owner Advisory message will be sent to applicable owners of record in MEB05-8A. Dear Cessna Owner: This Owner Advisory is to inform you that Service Bulletin MEB05-8 has been issued to transmit McCauley Alert Service Bulletin ASB251A: Hubs Manufactured With Improper Retention Threads. According to McCauley, "A total of 40 threaded retention constant speed and feathering hubs have been manufactured with improperly machined socket retention threads. The condition can cause concentrated loading on the threads that could result in hub cracking and blade separation." Compliance is mandatory; shall be accomplished within the next 10 hours of operation as described in McCauley Alert Service Bulletin ASB251A (or latest revision). The information contained in the referenced Cessna Service Bulletin shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for continued airworthiness, and must be accomplished for ongoing airworthiness compliance as required per 14 CFR Part 43.13. A parts and labor allowance credit will be provided for affected propeller hubs as detailed in McCauley Alert Service Bulletin ASB251A (or latest revision). Please contact a Cessna Multi-engine Service Station for detailed information and arrange to have Cessna Service Bulletin MEB05-8/McCauley Alert Service Bulletin ASB251A (or latest revision) accomplished on your airplane.

*******

MEB05-8 Page 4 October 17, 2005