# AD 80-17-10: Transition Wastegate Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Lycoming Engines TIO-540-S1AD
- Effective: August 18, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-3880
- Registered aircraft: 5,090 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA54E58E9B9A688B86256841005CC125.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/80-17-10

## The airworthiness directive

80-17-10 AVCO LYCOMING: Amendment 39-3880. Applies to Lycoming Model TIO-540-S1AD engine with serial numbers thru S/N L-6991-61A except:

S/Ns

L-5253-61A L-6669-61A L-5616-61A L-6671-61A L-5641-61A L-6775-61A L-5691-61A L-6840-61A L-5808-61A L-6860-61A L-5823-61A L-6861-61A L-5878-61A L-6886-61A L-5909-61A L-6887-61A L-5967-61A L-6888-61A L-5970-61A L-6900-61A Thru L-6905-61A L-6160-61A L-6915-61A Thru L-6921-61A L-6183-61A L-6930-61A Thru L-6940-61A L-6451-61A L-6979-61A Thru L-6988-61A and L-6990-61A

installed in Piper PA-32RT-300T and PA-32R-301T aircraft.

Compliance is required prior to each flight after receipt of this directive until a new transition wastegate assembly P/N LW16858 is installed. To prevent loss of engine power control due to seized throttle movement, accomplish the following: 1. Prior to each flight check the throttle movement for stiffness or binding as follows: a. Release the throttle friction lock in the cockpit. b. Move the throttle from idle to full open and back to idle. c. If the throttle movement is stiff or binds, replace any wastegate valve or cable assembly with a new assembly in accordance with Lycoming S/B 448. 2. An alternate method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Eastern Region. The checks in this AD may be accomplished by the pilot. Any corrective action required by this AD must be accomplished by a person authorized by FAR 43.3. Piper special advisory Telex SA-32RT-300T/32R-301-1 dated February 8, 1980, and Lycoming Service Bulletin No. 448 pertain to this subject. This AD is effective on August 18, 1980, and was effective upon receipt for all recipients of the letter dated March 17, 1980, which concerned this subject.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E14EA](https://openairdocs.org/tcds/E14EA): Lycoming Engines; names 1 of 40 models: TIO-540-S1AD

## 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: 5,090 (0 by airframe model, 5,090 by engine model)
- Makers: Piper 3,663, Cessna 631, Mooney 222, Aero Commander 117, Bellanca 111, Smith 98, Rockwell International 92, Socata 51, Commander 21, Aerofab 17

Models with the most aircraft:

- [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series): 4,886 aircraft (engine model)
- [Lycoming TIO-540 series](https://openairdocs.org/engine/lycoming-tio-540-series): 191 aircraft (engine model)
- [Lycoming TIO-540-S1AD](https://openairdocs.org/engine/lycoming-tio-540-s1ad): 13 aircraft (engine model)

All 4 models: https://openairdocs.org/ad/80-17-10/models.md
Every aircraft: https://openairdocs.org/ad/80-17-10/aircraft.md

Its text cites no advisory circulars or STCs.

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