# AD 88-04-03: Digital Flight Data Recorder and Cockpit Voice Recorder Power Supply

- Type: Airworthiness directive
- Status: Current
- Products: ATR - GIE Avions de Transport R gional ATR42-200, ATR42-300, ATR42-320 and ATR42-500
- Effective: March 21, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5846
- Registered aircraft: 28 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/14B5FAE555B481F286256982006FE31A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/88-04-03

## The airworthiness directive

88-04-03 AEROSPATIALE: Amendment 39-5846. Applies to Model ATR-42 series airplanes, as listed in Service Bulletin ATR42-23-0002, Revision No. 1, dated March 11, 1987, certificated in any category. Compliance is required within one year of the effective date of this AD, unless previously accomplished.

To prevent the loss of recorded information by continued operation of the Digital Flight Data Recorder (DFDR) and Cockpit Voice Recorder (CVR) after an accident, accomplish the following:

A. Modify the DFDR and CVR power supply logic in accordance with Aerospatiale Service Bulletin ATR42-23-0002, Revision No. 1, dated March 11, 1987.

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

C. Special flight permits may be issued inaccordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by 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 Aerospatiale, 316 Route de Bayonne, 31060 Toulouse Cedex 03, France. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective March 21, 1988.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A53EU](https://openairdocs.org/tcds/A53EU): ATR – GIE Avions de Transport Régional; names 4 of 11 models: ATR42-300, ATR42-320, ATR42-200, ATR42-500

## 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: 28 (28 by airframe model, 0 by engine model)
- Makers: Aerospatiale/Aeritalia 16, Atr-Gie Avions De Trnsp Region 6, Aerospatiale/Alenia 3, Atr-Gie Avions De Transport 1, Atr-Gie Avions De Trnsp Rgnl 1, Eads/Alenia ATR 1

Models with the most aircraft:

- [Aerospatiale/Aeritalia ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300): 12 aircraft (airframe model)
- [Atr-Gie Avions De Trnsp Region ATR42-500](https://openairdocs.org/model/atr-gie-avions-de-trnsp-region-atr42-500): 6 aircraft (airframe model)
- [Aerospatiale/Aeritalia ATR 42-320](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-320): 4 aircraft (airframe model)
- [Aerospatiale/Alenia ATR 42-320](https://openairdocs.org/model/aerospatiale-alenia-atr-42-320): 2 aircraft (airframe model)
- [Atr-Gie Avions De Transport ATR-42-320](https://openairdocs.org/model/atr-gie-avions-de-transport-atr-42-320): 1 aircraft (airframe model)
- [Atr-Gie Avions De Trnsp Rgnl ATR 42-300](https://openairdocs.org/model/atr-gie-avions-de-trnsp-rgnl-atr-42-300): 1 aircraft (airframe model)
- [Eads/Alenia ATR ATR 42-500](https://openairdocs.org/model/eads-alenia-atr-atr-42-500): 1 aircraft (airframe model)
- [Aerospatiale/Alenia ATR42-500](https://openairdocs.org/model/aerospatiale-alenia-atr42-500): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/88-04-03/models.md
Every aircraft: https://openairdocs.org/ad/88-04-03/aircraft.md

Its text cites no advisory circulars or STCs.

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