# AD 83-19-01: Forward and Aft Fin Spars Repair/Modification

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-38-112
- Effective: September 29, 1983
- Published: September 23, 1983
- Issued: September 14, 1983
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4727
- Registered aircraft: 442 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EE4A7AE8AAE571F1862569A6005C95DD.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/83-19-01

## The airworthiness directive

83-19-01 PIPER: Amendment 39-4727. Applies to Model PA-38-112 (S/Ns 38-78A0001 thru 38-82A0122) airplanes certificated in any category.

Compliance: Required as indicated, unless already accomplished.

To prevent possible inflight failure of the fin and stabilizer attachment because of fatigue damage, accomplish the following:

a) Within the next 25 hours time-in-service on airplanes that have 500 or more hours time-in-service on the effective date of this AD, or upon the accumulation of 525 hours time-in-service on airplanes that have less than 500 hours time-in-service on the effective date of this AD, and at intervals not exceeding 100 hours time-in-service thereafter:

1) Inspect and, if necessary, repair or modify the forward and aft fin spars in accordance with the directions and criteria contained in the INSTRUCTIONS section of Piper Service Bulletin No. 763A dated July 25, 1983.

b) The repetitive inspections required by this AD may be discontinued upon the incorporation of Piper Kit No. 764 965.

c) The interval between the repetitive inspections required by this AD may be adjusted up to 10 percent of the specified interval to allow accomplishing these inspections concurrent with other scheduled maintenance of the airplane.

d) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

e) An equivalent method of compliance with this AD may be used if approved by the Manager, New York Aircraft Certification Office, FAA, Room 202, 181 South Franklin Avenue, Valley Stream, New York 11581.

This amendment becomes effective on September 29, 1983.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A18SO](https://openairdocs.org/tcds/A18SO): Piper Aircraft Inc.; names 1 of 1 models: PA-38-112

## 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: 442 (442 by airframe model, 0 by engine model)
- Makers: Piper 442

Models with the most aircraft:

- [Piper PA-38-112](https://openairdocs.org/model/piper-pa-38-112): 442 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/83-19-01/models.md
Every aircraft: https://openairdocs.org/ad/83-19-01/aircraft.md

Its text cites no advisory circulars or STCs.

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