# AD 88-25-10: Flap Control Switch

- Type: Airworthiness directive
- Status: Current
- Products: Embraer EMB-110P1 and EMB-110P2
- Effective: January 5, 1989
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-6086
- Registered aircraft: 13 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/549938B91341E62D862569ED006A5722.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/88-25-10

## The airworthiness directive

88-25-10 EMPRESA BRASILEIRA DE AERONAUTICA, S.A. (EMBRAER): Amendment 39-6086.

Applicability: Models EMB-110P1 and EMB-110P2 (serial numbers (S/N) 110001 up to and including S/N 110466) airplanes equipped with multi position flap control switch P/N 110- 898-14, certificated in any category.

Compliance: Within the next 50 hours time-in-service after the effective date of this AD, unless previously accomplished.

To reduce the potential for inadvertent full flap extension that could result in loss of control of the airplane in a critical phase of flight, accomplish the following:

  (a) Replace the flap control switch, P/N 110-898-14, with flap control switch P/N 110-898-14, Revision S, in accordance with Part I of EMBRAER Service Bulletin (SB) 110-027-0084, dated March 23, 1988; or

  (b) Modify the flap control switch, P/N 110-898-14, in accordance with Part II of EMBRAER SB 110-027-0084, dated March 23, 1988, and electrically test the reassembled switch and adjust the potentiometer, if required, to resistance values specified for P/N 110-898- 14, Revision G, after the above modification in accordance with Section 2A "Adjusting the Potentiometer" as described in EMBRAER "Maintenance Manual with Illustrated Parts List", No. T.P. 27-50-00/646, dated February 15, 1985. The above modification, test and adjustment must be performed by an appropriately rated repair station.

  (c) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

  (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Atlanta Aircraft Certification Office, FAA, Central Region.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to EMBRAER, 276 S.W. 34th Street, Fort Lauderdale, Florida 33315, or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment (39-6086, AD 88-25-10) becomes effective January 5, 1989.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A21SO](https://openairdocs.org/tcds/A21SO): Embraer S.A.; names 2 of 2 models: EMB-110P1, EMB-110P2

## 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: 13 (13 by airframe model, 0 by engine model)
- Makers: Embraer 13

Models with the most aircraft:

- [Embraer EMB-110P1](https://openairdocs.org/model/embraer-emb-110p1): 13 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/88-25-10/models.md
Every aircraft: https://openairdocs.org/ad/88-25-10/aircraft.md

Its text cites no advisory circulars or STCs.

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