# AD 79-20-10: Piper Kit 763 893

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30 and PA-39
- Effective: October 4, 1979
- Published: October 1, 1979
- Issued: September 19, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3579
- Registered aircraft: 3,192 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B81EE4072873C7688625699E004AF817.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/79-20-10

## The airworthiness directive

79-20-10 PIPER: Amendment 39-3579. Applies to the following Piper Model airplanes:

PA-24 Serial Nos. 24-1 and up PA-24-250 Serial Nos. 24-1 and up PA-24-260 Serial Nos. 24-3642, 24-4000 and up PA-24-400 Serial Nos. 26-1 and up PA-30 Serial Nos. 30-1 and up PA-39 Serial Nos. 39-1 and up,

certificated in all categories except airplanes incorporating Piper Kit Part No. 763 893:

  (a) Within the next 50 hours in service, after the effective date of this AD, unless already accomplished within the past 50 hours in service and at intervals not to exceed 100 hours in service thereafter, inspect in accordance with paragraph "Instructions" in Service Letter No. 850 dated April 18, 1979, Parts 1, 2, 3, 4a, b and c or equivalent inspection.

  (b) Upon incorporation of Piper Kit No. 763 893 or equivalent, compliance with this AD may be terminated.

  (c) Equivalent parts and inspections and alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

  (d) Upon submittal of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection intervals specified in this AD.

This supersedes AD 74-10-03.

This amendment is effective October 4, 1979.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A15](https://openairdocs.org/tcds/1A15): Piper Aircraft Inc.; names 4 of 4 models: PA-24, PA-24-260, PA-24-250, PA-24-400
- [TCDS A1EA](https://openairdocs.org/tcds/A1EA): Piper Aircraft Inc.; names 2 of 3 models: PA-30, PA-39

## 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: 3,192 (3,192 by airframe model, 0 by engine model)
- Makers: Piper 3,192

Models with the most aircraft:

- [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 1,222 aircraft (airframe model)
- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 878 aircraft (airframe model)
- [Piper PA-24-260](https://openairdocs.org/model/piper-pa-24-260): 590 aircraft (airframe model)
- [Piper PA-24](https://openairdocs.org/model/piper-pa-24): 345 aircraft (airframe model)
- [Piper PA-39](https://openairdocs.org/model/piper-pa-39): 82 aircraft (airframe model)
- [Piper PA-24-400](https://openairdocs.org/model/piper-pa-24-400): 75 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/79-20-10/models.md
Every aircraft: https://openairdocs.org/ad/79-20-10/aircraft.md

Its text cites no advisory circulars or STCs.

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