AD 75-16-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Israel Aircraft Industries, Ltd. | 1121 | Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes |
| aircraft | Israel Aircraft Industries, Ltd. | 1121A | Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes |
| aircraft | Israel Aircraft Industries, Ltd. | 1121B | Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes |
| aircraft | Israel Aircraft Industries, Ltd. | 1123 | Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes |
Unsafe Condition
Loss of attitude information and improper operation of the autopilot due to the autopilot vertical reference component installed in an unpressurized area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard on the instrument panel stating 'Cross Check Attitude Indicators with Third Attitude Indicator to Detect Unflagged Failures' before further IFR or night flight. Modify the vertical reference component per Collins Service Bulletin No. 9 within 100 hours' time in service after the AD's effective date. Remove the placard after completing the modification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further IFR or night flight and within 100 hours' time in service after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Israel Aircraft Industries, Ltd. Models 1121, 1121A, 1121B, and 1123 airplanes with autopilot vertical reference component Collins P/N 332D-11/522-3985-001 or Collins P/N 332D-11A/792-6694-001 installed in an unpressurized area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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