# AD 76-01-01: High Speed Flutter

- Type: Airworthiness directive
- Status: Current
- Products: Cessna A150K, A150L, FA150K and FA150L with STC SA1809WE
- Effective: January 9, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2483
- Registered aircraft: 152 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/70A3274AABA013D986256A340066BA44.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/76-01-01

## The airworthiness directive

76-01-01 CESSNA and REIMS AVIATION: Amendment 39-2483. Applies to Cessna Models A150K and A150L and Reims Aviation Models FA150K and FA150L airplanes certified in the acrobatic category, which have been modified in accordance with STC SA1809WE, incorporating Flint Aero auxiliary fuel tanks in the outboard wing panels.

Compliance is required within ten days after the effective date of this AD, unless already accomplished.

To prevent the possibility of encountering high speed flutter with fuel in these auxiliary fuel tanks, accomplish the following:

  (a) Adjacent to the airspeed indicator and in full view of the pilot, attach a placard which reads:

Airspeed Limits when auxiliary tanks contain any amount of fuel:

Vne (never exceed) = 162 MPH (141 knots) Vno (max. structural cruising) = 120 MPH (104 knots) Va (maneuvering) = 109 MPH ( 95 knots)

  (b) Any equivalent method of showing compliance with this AD or any demonstration of freedom from flutter of this design must be approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This amendment becomes effective January 9, 1976.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 2 of 18 models: A150L, A150K
- [TCDS A13EU](https://openairdocs.org/tcds/A13EU): Textron Aviation Inc.; names 2 of 14 models: FA150L, FA150K

## 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: 152 (152 by airframe model, 0 by engine model)
- Makers: Cessna 152

Models with the most aircraft:

- [Cessna A150L](https://openairdocs.org/model/cessna-a150l): 80 aircraft (airframe model)
- [Cessna A150K](https://openairdocs.org/model/cessna-a150k): 72 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/76-01-01/models.md
Every aircraft: https://openairdocs.org/ad/76-01-01/aircraft.md

## Related documents

- [STC SA1809WE](https://openairdocs.org/stc/SA1809WE): Installation of one twelve-gallon auxiliary fuel tank in each outboard wing panel.. Flint Aero Inc, Named in the applicability

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