# AD 78-08-03: Rudder Hinge Bracket Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-23 and PA-23-160
- Effective: November 10, 1978
- Published: November 9, 1978
- Issued: October 27, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3339
- Registered aircraft: 343 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/13936BB02E80E3D486256E120055A197.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/78-08-03

## The airworthiness directive

78-08-03 PIPER: Amendment 39-3178 as amended by Amendment 39-3339. Applies to Piper Models PA-23 and PA-23-160, Serial Nos. 23-1 and up certificated in all categories.

To prevent hazards in flight associated with cracks in the rudder upper hinge reinforcing bracket or rudder lower hinge bracket assembly, accomplish the following:

  (a) Within the next 25 hours in service from the effective date of this AD or upon the attainment of 1000 total hours in service, whichever is later, remove the rudder upper hinge P/N 17063-03 and inspect the rudder upper hinge reinforcement bracket P/N 17067-18 or equivalent for cracks using a dyne penetrant or equivalent method. Also inspect the rudder lower hinge bracket assembly P/N 17289-00 in the bearing area for cracks using a dye penetrant or equivalent method.

  (b) Within 1000 hours in service after the inspection in (a), and thereafter at intervals not to exceed 1000 hours since the last inspection accomplish the inspections required in (a).

  (c) If cracks are found in the reinforcing bracket during the inspections of paragraphs (a) or (b) remove it and inspect the spar web for cracks using a dye penetrant method or equivalent.

  (d) Cracked parts must be replaced using undamaged parts of the same part number or equivalent before further flight.

  (e) Equivalent inspections and repairs must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region or accomplished in accordance with Advisory Circular 43.13-1A and approved by an FAA Maintenance Inspector.

  (f) Upon submission 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.

  (g) Report positive findings from paragraph (a) to Chief, Engineering and Manufacturing Section, FAA, Eastern Region within ten days of inspection. (Reporting approved by Office of Management and Budget under OMB No. 04-R0174).

Amendment 39-3178 was effective April 14, 1978.

This amendment 39-3339 is effective November 10, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A10](https://openairdocs.org/tcds/1A10): Piper Aircraft Inc.; names 2 of 6 models: PA-23-160, PA-23

## 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: 343 (343 by airframe model, 0 by engine model)
- Makers: Piper 343

Models with the most aircraft:

- [Piper PA-23-160](https://openairdocs.org/model/piper-pa-23-160): 188 aircraft (airframe model)
- [Piper PA-23](https://openairdocs.org/model/piper-pa-23): 155 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/78-08-03/models.md
Every aircraft: https://openairdocs.org/ad/78-08-03/aircraft.md

## Related documents

- [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13-1A in the AD's requirements

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