# AD 90-20-04: Engine Push-Pull Cables

- Type: Airworthiness directive
- Status: Current
- Products: Polskie Zaklady Lotnieze Spolka zo.o PZL M18 and PZL M18A
- Effective: October 17, 1990
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-6722
- Docket: 90-CE-17-AD
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88C0C7FFBAD2DA7986256A6F004D9AB2.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/90-20-04

## The airworthiness directive

90-20-04 WYTWORNIA SPRZETU KOMUNEKACYJNEGO PZL-MIELEC: Amendment 39-6722. Docket No. 90-CE-17-AD.

Applicability: Models M18 and M18A (Dromader) (Serial Numbers 1Z001-01 through 1Z021-20) airplanes, certificated in any category.

Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished.

To prevent failure of the engine push-pull cables and loss of engine control, accomplish the following:

  (a) Remove the engine throttle control and the propeller governor push-pull control and replace those cables in accordance with the instructions and part numbers referenced in PZL- Mielec Mandatory Engineering Bulletin No. K/02.127/89, dated February 1990.

  (b) The airplane may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

  (c) An alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be approvedby the Manager, Brussels Aircraft Certification Office, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, B- 1000 Brussels, Belgium; Telephone 322-513.38.30 extension 2710/2711.

NOTE: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels Aircraft Certification Office.

All persons affected by this directive may obtain copies of the document referred to herein upon request to Wytwornia Sprzetu Komunekacyjnego PZL-Mielec 39-301 Mielec, Poland; or may examine this document at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.

This amendment (39-6722, AD 90-20-04) becomes effective on October 17, 1990.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A47EU](https://openairdocs.org/tcds/A47EU): Polskie Zakłady Lotnicze Sp. z o.o.; names 2 of 3 models: PZL M18, PZL M18A

## 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: 1 (1 by airframe model, 0 by engine model)
- Makers: WSK PZL Mielec 1

Models with the most aircraft:

- [WSK PZL Mielec PZL-M18A](https://openairdocs.org/model/wsk-pzl-mielec-pzl-m18a): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/90-20-04/models.md
Every aircraft: https://openairdocs.org/ad/90-20-04/aircraft.md

Its text cites no advisory circulars or STCs.

## NTSB investigations that cite this AD (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI96LA236](https://openairdocs.org/ntsb/CHI96LA236), Jul 10, 1996: Wsk Pzl Mielec M-18 Dromader (N2047S), Waupaca, WI, substantial damage. Probable cause: inadequate maintenance of the throttle cable by maintenance personnel.

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