# AD 74-17-08: Fuel Line Clamps

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-34-200
- Effective: August 15, 1974
- Published: August 9, 1974
- Issued: August 7, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1918
- Registered aircraft: 172 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D1AF2056C875F1D98625699900513B43.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/74-17-08

## The airworthiness directive

74-17-08 PIPER: Amendment 39-1918. Applies to PA-34-200 airplanes Serial Numbers 34-7250001 to 34-7450209 inclusive, certificated in all categories.

Compliance required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent fuel line chafing and fuel leaks, accomplish the following:

Modify the fuel and instrumentation line clamping in accordance with Piper Service Bulletin No. 429 or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region. Replace all lines that have been damaged by chafing, wear, with serviceable lines of the same part number or equivalent lines approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration Southern Region.

This amendment becomes effective August 15, 1974.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A7SO](https://openairdocs.org/tcds/A7SO): Piper Aircraft Inc.; names 1 of 5 models: PA-34-200 (Seneca)

## 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: 172 (172 by airframe model, 0 by engine model)
- Makers: Piper 172

Models with the most aircraft:

- [Piper PA-34-200](https://openairdocs.org/model/piper-pa-34-200): 172 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/74-17-08/models.md
Every aircraft: https://openairdocs.org/ad/74-17-08/aircraft.md

Its text cites no advisory circulars or STCs.

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