# AD 72-07-02: Selector Value Placard - Type: Airworthiness directive - Status: Current - Products: Cessna 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I and 172K - Effective: March 25, 1972 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-1415 - Registered aircraft: 7,701 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2C7B32477D2A88A286256A340063355D.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/72-07-02 ## The airworthiness directive 72-07-02 CESSNA: Amdt. 39-1415. Applies to the following airplanes: MODELS SERIAL NUMBERS AFFECTED 172 28000 thru 29999 172 36000 thru 36999 172 46001 thru 46754 172A 46755 thru 47746 172B 17247747 thru 17248734 172C 17248735 thru 17249544 172D 17249545 thru 17250572 172E 17250573 thru 17251822 172F 17251823 thru 17253392 172G 17253393 thru 17254892 172H 17254893 thru 17256512 172I 17256513 thru 17257161 172K 17257162 thru 17258855 Compliance: Required as indicated, unless already accomplished. To reduce the possibility of engine power interruption at altitudes above 5000 feet caused by vapor formation in the fuel lines, accomplish the following: (A) Effective now, the airplane must be operated on a single fuel tank immediately upon reaching cruise altitudes above 5000 feet. (B) On or before April 1, 1972, install at the fuel selector valve applicable Cessna placards P/N's 0509021-1, 0509021-2 or 0509021-3 as provided with Cessna Service Letter SE72-7, dated March 17, 1972, or any FAA-approved equivalent placard which reads as follows: SWITCH TO SINGLE TANK OPERATION IMMEDIATELY UPON REACHING CRUISE ALTITUDES ABOVE 5000 FEET. (C) Compliance with the provisions of Paragraphs A and B is no longer required when the fuel system has been modified by the installation of applicable Cessna Kit No. SK172-31B or SK172-32 referenced by Cessna Service Letter SE72-7, dated March 17, 1972, or by the accomplishment of any equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective March 25, 1972. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 11 of 18 models: 172F (USAF T-41A), 172K, 172G, 172A, 172, 172H (USAF T-41A), 172D, 172C… ## 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: 7,701 (7,701 by airframe model, 0 by engine model) - Makers: Cessna 7,701 Models with the most aircraft: - [Cessna 172](https://openairdocs.org/model/cessna-172): 1,805 aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model) - [Cessna 172H](https://openairdocs.org/model/cessna-172h): 780 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) - [Cessna 172E](https://openairdocs.org/model/cessna-172e): 617 aircraft (airframe model) - [Cessna 172D](https://openairdocs.org/model/cessna-172d): 471 aircraft (airframe model) - [Cessna 172A](https://openairdocs.org/model/cessna-172a): 435 aircraft (airframe model) - [Cessna 172B](https://openairdocs.org/model/cessna-172b): 413 aircraft (airframe model) - [Cessna 172C](https://openairdocs.org/model/cessna-172c): 362 aircraft (airframe model) - [Cessna 172I](https://openairdocs.org/model/cessna-172i): 353 aircraft (airframe model) All 11 models: https://openairdocs.org/ad/72-07-02/models.md Every aircraft: https://openairdocs.org/ad/72-07-02/aircraft.md Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CEN23LA206](https://openairdocs.org/ntsb/CEN23LA206), May 29, 2023: Cessna 172B (N8098X), Divide, CO, substantial damage. Probable cause: A loss of engine power during cruise flight for reasons that could not be determined. --- 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.