# AD 72-24-02: Throttle Movement Placard

- Type: Airworthiness directive
- Status: Current
- Products: Lavia Argentina PA-25, PA-28-140, PA-28-150, PA-28-160 and PA-28S-160
- Effective: November 17, 1972
- Published: November 15, 1972
- Issued: November 3, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1557
- Registered aircraft: 4,693 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C122F7D72F3ECFA2862569990050F99F.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/72-24-02

## The airworthiness directive

72-24-02 PIPER: Amendment 39-1557. Applies to Model PA-28-140, PA-28-150, PA- 28-160, PA-28-S-160, PA-25 (150 HP) airplanes, equipped with Lycoming O-320 engines and Marvel Schebler carburetors Model MA-4SPA, Part Number 10-3678-32 certificated in all categories.

Compliance required within the next 10 hours' time in service after the effective date of this airworthiness directive, unless already accomplished:

To prevent power interruption as a result of abrupt throttle movement, accomplish the following:

  (a) Attach the following operating limitation placard to the instrument panel near the throttle control in full view of the pilot using 1/8" minimum size type: "DO NOT OPEN THE THROTTLE RAPIDLY. (IDLE TO FULL THROTTLE IN 2 SECONDS MINIMUM.)" The placard may be fabricated by the owner/operator.

This amendment becomes effective November 17, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A13](https://openairdocs.org/tcds/2A13): Piper Aircraft Inc.; names 4 of 18 models: PA-28-150, PA-28-140, PA-28S-160, PA-28-160

## 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: 4,693 (4,693 by airframe model, 0 by engine model)
- Makers: Piper 4,693

Models with the most aircraft:

- [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 4,258 aircraft (airframe model)
- [Piper PA-28-160](https://openairdocs.org/model/piper-pa-28-160): 253 aircraft (airframe model)
- [Piper PA-28-150](https://openairdocs.org/model/piper-pa-28-150): 123 aircraft (airframe model)
- [Piper PA-25](https://openairdocs.org/model/piper-pa-25): 59 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/72-24-02/models.md
Every aircraft: https://openairdocs.org/ad/72-24-02/aircraft.md

Its text cites no advisory circulars or STCs.

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