# AD 77-02-09: Wing Flap System - Type: Airworthiness directive - Status: Current - Products: Cessna 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L and 52 more - Effective: February 3, 1977 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-2820 - Registered aircraft: 41,820 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C62F9032CA7AE9B86256A3400683001.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/77-02-09 ## The airworthiness directive 77-02-09 CESSNA: Amendment 39-2820. Applies to the following Models and Serial Numbers of aircraft: Model 150 Serial Numbers 15078687 thru 78733, 78735 thru 78782, 78784 thru 78789, 78791 thru 78839, 78841 thru 78848, 78850 thru 78856, 78858 thru 78865, 78867 thru 78906, 78908 thru 78921, 78923, 78926 thru 78928, 78931, 78932, 78934 thru 78938, 78940 thru 78947, 78950 thru 78955, 78958, 78960 thru 78968, 78971 thru 78973, 78976, 78977, 78978, 78980, 78981, 78984 thru 78987, 78994, 78995, 78998 Model A150 Serial Numbers A1500697 thru 0706, 0709, 0711 Model 172 Serial Numbers 17267789 thru 67814, 67816 thru 67877, 67879 thru 67884, 67886 thru 67957, 67959 thru 67988, 67990 thru 68021, 68023 thru 68029, 68031 thru 68053, 68055 thru 68060, 68062 thru 68077, 68079, 68081 thru 68089, 68091 thru 68097, 68099 thru 68105, 68107, 68108, 68111 thru 68116, 68119, 68121 thru 68123, 68125 thru 68129, 68131 thru 68133, 68135 thru 68138, 68140, 68142, 68145 thru 68153, 68155thru 68158, 68160, 68161, 68163, 68167, 68168, 68170 thru 68176, 68178 thru 68180, 68183, 68185, 68188, 68190, 68191, 68193, 68195, 68196, 68198, 68200 thru 68202, 68207, 68208, 68210, 68211, 68214 thru 68217, 68219, 68226, 68239 Model R172 Serial Numbers R1722028 thru 2091, 2093 thru 2096, 2098 thru 2102, 2105 thru 2108, 2111, 2112, 2115 thru 2117, 2119, 2120, 2123 thru 2125, 2134, 2140 Model 182 Serial Numbers 18265065 thru 65107, 65109 thru 65147, 65149 thru 65158, 65160 thru 65174, 65176 thru 65199, 65201 thru 65209, 65211, 65212, 65215 thru 65219, 65222 thru 65227, 65229, 65230, 65233 thru 65239, 65241, 65243, 65245, 65247, 65249 thru 65252, 65254 Model 206 Serial Numbers U20603454 thru 03469, 03471 thru 03473, 03475 thru 03491, 03493 thru 03497, 03501 thru 03505, 03507 thru 03513, 03515 thru 03519, 03521, 03523 thru 03527, 03529 thru 03534, 03536, 03538 thru 03540, 03542 thru 03547, 03549 thru 03553, 03557, 03561, 03562 Model 207 Serial Numbers 20700357 thru 00362, 00364 thru 00367 Compliance: Required as indicated, unless already accomplished. A. Before the next flight of the affected airplanes, visually inspect the P/N C301002-0101 (12 volt) or C301002-0102 (24 volt) wing flap actuator for the date code stamp. 1. If the date code stamp on the actuator is OH, HH, WH, or ZH install a placard near the flap control which reads: "FLAP EXTENSION PROHIBITED" and operate the aircraft in accordance with this limitation. 2. Within 50 hours' time in service after the effective date of this AD, replace the wing flap actuator ball nut assembly with an airworthy assembly in accordance with Cessna Service Letter SE76-25, dated December 13, 1976, or later approved revision. The placard required by Paragraph A.1. may be removed when the replacement ball nut assembly is installed. 3. If the date stamp code on the actuator is not one of those identified in Paragraph A.1., make an entry in the aircraft maintenance records indicating that this AD has been accomplished and the airplane may be returned to service. B. Airplanes located where the inspection cannot be accomplished may be flown in accordance with FAR 21.197 to a place where the inspection may be accomplished, providing the flaps are not used for the flight. C. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. NOTE 1. The date code stamp is steel stamped into the lower side of the actuator gear housing, adjacent to the flap motor and switch bar, is visible on the lower side of the actuator as it is installed in the aircraft. Inked stamped numbers on the motor housing are to be disregarded. NOTE 2. The manufacturer has advised the FAA that sufficient replacement parts are available to accomplish Paragraph A.2. of this AD. This amendment becomes effective February 3, 1977, to all persons except those to whom it was made effectiveearlier by air mail letters dated January 13, 1977. ## Affected data sheets (6) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 19 of 23 models: 182D, 182A, 182J, 182P, 182B, 182L, 182G, 182Q… - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 18 of 18 models: 172F (USAF T-41A), 172M, 172Q, 172R, 172K, 172G, 172A, 172L… - [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 16 of 18 models: 150L, 150B, 150D, A150L, A150K, 150E, A150M, 150M… - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 7 of 12 models: R172H, R172G, R172K, R172F, 172RG, R172J, R172E - [TCDS A16CE](https://openairdocs.org/tcds/A16CE): Textron Aviation Inc.; names 2 of 4 models: 207, 207A - [TCDS A4CE](https://openairdocs.org/tcds/A4CE): Textron Aviation Inc.; names 2 of 29 models: 206, 206H ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 41,820 (41,820 by airframe model, 0 by engine model) - Makers: Cessna 40,227, Textron 1,586, P Z L Koliber 4, Cessna Wren 3 Models with the most aircraft: - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,573 aircraft (airframe model) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 aircraft (airframe model) - [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 aircraft (airframe model) - [Cessna 172S](https://openairdocs.org/model/cessna-172s): 1,914 aircraft (airframe model) - [Cessna 172](https://openairdocs.org/model/cessna-172): 1,805 aircraft (airframe model) - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 aircraft (airframe model) - [Cessna 150L](https://openairdocs.org/model/cessna-150l): 1,447 aircraft (airframe model) - [Cessna 150M](https://openairdocs.org/model/cessna-150m): 1,439 aircraft (airframe model) - [Textron 172S](https://openairdocs.org/model/textron-172s): 1,239 aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 aircraft (airframe model) - [Cessna 150F](https://openairdocs.org/model/cessna-150f): 1,063 aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model) - [Cessna 150G](https://openairdocs.org/model/cessna-150g): 977 aircraft (airframe model) - [Cessna 182T](https://openairdocs.org/model/cessna-182t): 968 aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 857 aircraft (airframe model) - [Cessna 182A](https://openairdocs.org/model/cessna-182a): 784 aircraft (airframe model) - [Cessna 172H](https://openairdocs.org/model/cessna-172h): 780 aircraft (airframe model) - [Cessna 150H](https://openairdocs.org/model/cessna-150h): 756 aircraft (airframe model) - [Cessna 172G](https://openairdocs.org/model/cessna-172g): 722 aircraft (airframe model) - [Cessna 172F](https://openairdocs.org/model/cessna-172f): 717 aircraft (airframe model) All 72 models: https://openairdocs.org/ad/77-02-09/models.md Every aircraft: https://openairdocs.org/ad/77-02-09/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.