# AD 54-19-01: Brake Line Cover Plate

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-18A
- Published: December 4, 1956
- Issued: December 4, 1956
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 152 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C0C6401D204DBBC8625698B00764684.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/54-19-01

## The airworthiness directive

54-19-01 PIPER: Applies to Models PA-18A and PA-18A Restricted Category Aircraft With Dusting Venturi, Up to and Including Serial Number 18-3752.

Compliance required not later than October 15, 1954.

There have been several instances of excessive CO concentration in the cockpit when the dusting venturi is used. Such contamination has serious adverse effects upon pilot reaction. To prevent CO from entering the cockpit, a new trim plate should be installed and a new brake line cover plate should be placed over the brake line where the line enters the bottom of the fuselage.

(Piper Service Letter No. 225, dated August 23, 1954, covers the same subject.)

## 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: 152 (152 by airframe model, 0 by engine model)
- Makers: Piper 152

Models with the most aircraft:

- [Piper PA-18A](https://openairdocs.org/model/piper-pa-18a): 152 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/54-19-01/models.md
Every aircraft: https://openairdocs.org/ad/54-19-01/aircraft.md

Its text cites no advisory circulars or STCs.

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