# AD 81-07-07: Intercom System Overheating

- Type: Airworthiness directive
- Status: Current
- Products: Israel Aircraft Industries 1123, 1124 and 1124A
- Effective: August 5, 1985
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-5102
- Registered aircraft: 73 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8A8057777D0B7093862569F1006A3B78.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-07-07

## The airworthiness directive

81-07-07 ISRAEL AIRCRAFT: Amendment 39-5102. Applies to Israel Aircraft Industries Ltd. Westwind Models 1123, 1124, and 1124A (S/N 151 thru 315 except S/N 294, 296, 297, 309, 310, and 314) airplanes, certificated in any category. Compliance is required within the next 100 flight hours after the effective date of this amendment, unless previously accomplished.

A. To prevent fire due to overheating of the intercom system, replace the intercom system audio load R-61 resistor with an RH-25 resistor in a manner approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, or in accordance with IAI Service Bulletin WW-25 for the Model 1123 and IAI Service Bulletin WW-24-23 for the Models 1124 and 1124A.

B. Airplanes may be flown in accordance with FAR 21.197 and 21.199 to a maintenance base for accomplishment of the modification required by this AD.

This amendment becomes effective August 5, 1985. It was effective earlier to all recipientsof air mail letter AD 81-07-07, issued March 20, 1981, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2SW](https://openairdocs.org/tcds/A2SW): Israel Aircraft Industries Ltd.; names 3 of 6 models: 1124, 1124A, 1123

## 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: 73 (73 by airframe model, 0 by engine model)
- Makers: Israel Aircraft Industries 73

Models with the most aircraft:

- [Israel Aircraft Industries 1124](https://openairdocs.org/model/israel-aircraft-industries-1124): 45 aircraft (airframe model)
- [Israel Aircraft Industries 1124A](https://openairdocs.org/model/israel-aircraft-industries-1124a): 28 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/81-07-07/models.md
Every aircraft: https://openairdocs.org/ad/81-07-07/aircraft.md

Its text cites no advisory circulars or STCs.

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