# AD 89-23-18: Emergency Lighting Circuit System

- Type: Airworthiness directive
- Status: Current
- Products: Saab AB, Saab Aerosystems 340A (SAAB SF340A)
- Effective: December 12, 1989
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-6390
- Docket: 89-NM-65-AD
- Registered aircraft: 8 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/135F8B1F2AFB664B862569F30058B739.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/89-23-18

## The airworthiness directive

89-23-18 SAAB-SCANIA: Amendment 39-6390. Docket No. 89-NM-65-AD. Applicability: Model SF-340A series airplanes, Serial Numbers -004 through -159, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To ensure the operation of the emergency lighting system when required during an emergency situation, accomplish the following:

A. Within 60 days after the effective date of this AD, modify the emergency lighting activation circuit in accordance with SAAB Service Bulletin, SF340-33-028, Revision 1, dated January 26, 1989.

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment, and then send it to the Manager, Standardization Branch, ANM-113.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to SAAB-Scania Aircraft Division, Product Support, S-581 88 Linkoping, Sweden. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6390, AD 89-23-18) becomes effective on December 12, 1989.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A52EU](https://openairdocs.org/tcds/A52EU): Saab AB; names 1 of 2 models: 340A (SAAB SF340A)

## 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: 8 (8 by airframe model, 0 by engine model)
- Makers: Saab-Fairchild 8

Models with the most aircraft:

- [Saab-Fairchild 340A](https://openairdocs.org/model/saab-fairchild-340a): 8 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/89-23-18/models.md
Every aircraft: https://openairdocs.org/ad/89-23-18/aircraft.md

Its text cites no advisory circulars or STCs.

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