AD 85-02-05 R1Published 1997-11-03Effective 1997-11-21
The New Piper Aircraft, Inc. PA-20, PA- 22, PA-23, PA-24, PA-25, PA-30, PA-31P, PA-36, PA-39, and PA-44 Series Airplanes
Requires installing on the pilot's instrument panel a Piper part number (P/N) 81090-02 placard, which provides information for operation of the parking brake.
Full official abstract
Airworthiness Directives; The New Piper Aircraft, Inc. PA-20, PA- 22, PA-23, PA-24, PA-25, PA-30, PA-31P, PA-36, PA-39, and PA-44 Series Airplanes
This document clarifies information in Airworthiness Directive (AD) 85-02-05, which applies to all The New Piper Aircraft, Inc. (Piper) PA-20, PA-22, PA-23, PA-24, PA-25, PA-30, PA-31P, PA-36, PA-39, and PA-44 series airplanes. AD 85-02-05 currently requires installing on the pilot's instrument panel a Piper part number (P/N) 81090-02 placard, which provides information for operation of the parking brake. Piper has superseded that placard with a P/N 683-107 placard, and operators in need of a new placard can only obtain the P/N 683-107 placard. In this scenario, the owners/operators of the affected airplanes could not comply with AD 85-02-05 as currently written. The P/N 683-107 placard contains the same wording as the P/N 81090-02 placard. The actions specified in that AD are intended to prevent airplane controllability problems while involved in ground operation because of improper brake operations. This document maintains the placard requirement of AD 85-02-05, and adds the installation of the P/ N 683-107 placard as an option of compliance.
This document corrects or clarifies a previously issued AD of the same number — it is not a separate, additional requirement. Its "Effective" date above may predate its own "Published" date because it restates the original AD's effective date.
Source: Federal Register document 97-28983, retrieved 2026-08-15 · checked against the live Federal Register record on 2026-10-01