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.
Federal Register Abstract
Autopilot
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-16-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes Subject: Autopilot Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/12/1975 Make: Israel Aircraft Industries, Ltd. Model: 1121 | 1121A | 1121B | 1123 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-16-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2290 AD NUMBER: 75-16-16 SUBJECT HEADING: Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes ACTION: SUMMARY: DATES: Effective August 12, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-16 ISRAEL AIRCRAFT INDUSTRIES, LTD: Amendment 39-2290. Applies to Israel Aircraft Industries Jet Commander Models 1121, 1121A and 1121B, and Westwind Model 1123 airplanes certificated in all categories having autopilot vertical reference component Collins P/N 332D-11/522-3985-001 or Collins P/N 332D-11A/792-6694-001 or both, installed in an unpressurized area. Compliance is required as indicated unless already accomplished. To prevent loss of attitude information and improper operation of the autopilot, accomplish the following: (a) Before further IFR or night flight, install a placard on the instrument panel in full view of the pilot to read, "Cross Check Attitude Indicators with Third Attitude Indicator to Detect Unflagged Failures". (b) Within the next 100 hours' time in service, after the effective date of this AD, modify the vertical reference (Collins P/N 332D-11/522-3985-001, or Collins P/N 332D-11A/ 792-6694-001), in accordance with Collins Service Bulletin No. 9, dated May 1, l974, or an FAA-approved equivalent. (c) The placard required by paragraph (a) of this AD may be removed when the modification required by paragraph (b) has been accomplished. This amendment becomes effective August 12, 1975. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_75-16-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes Subject: Autopilot Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/12/1975 Make: Israel Aircraft Industries, Ltd. Model: 1121 | 1121A | 1121B | 1123 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-16-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2290 AD NUMBER: 75-16-16 SUBJECT HEADING: Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD Models 1121, 1121A, 1121B, and 1123 Airplanes ACTION: SUMMARY: DATES: Effective August 12, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-16 ISRAEL AIRCRAFT INDUSTRIES, LTD: Amendment 39-2290. Applies to Israel Aircraft Industries Jet Commander Models 1121, 1121A and 1121B, and Westwind Model 1123 airplanes certificated in all categories having autopilot vertical reference component Collins P/N 332D-11/522-3985-001 or Collins P/N 332D-11A/792-6694-001 or both, installed in an unpressurized area. Compliance is required as indicated unless already accomplished. To prevent loss of attitude information and improper operation of the autopilot, accomplish the following: (a) Before further IFR or night flight, install a placard on the instrument panel in full view of the pilot to read, "Cross Check Attitude Indicators with Third Attitude Indicator to Detect Unflagged Failures". (b) Within the next 100 hours' time in service, after the effective date of this AD, modify the vertical reference (Collins P/N 332D-11/522-3985-001, or Collins P/N 332D-11A/ 792-6694-001), in accordance with Collins Service Bulletin No. 9, dated May 1, l974, or an FAA-approved equivalent. (c) The placard required by paragraph (a) of this AD may be removed when the modification required by paragraph (b) has been accomplished. This amendment becomes effective August 12, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2004-14-14
final ruleAirworthiness Directives; Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
Unsafe Condition: Cracking of the skins of the rudder assembly, which could result in reduced structural capability of the rudder and reduced controllability of the airplane.
2003-11-07
final ruleAirworthiness Directives; Israel Aircraft Industries, Ltd. Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
Unsafe Condition: Rapid adiabatic compression within the oxygen line between the oxygen shutoff valve and the pressure regulator due to a shutoff valve that can be opened quickly, which could result in overheating o...
2000-23-13
final ruleAirworthiness Directives; Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
Unsafe Condition: Incorrect installation of the tie rod through the dust shield and both jackscrew assemblies on the horizontal stabilizer trim actuator can lead to jamming or disconnection of the actuator, resultin...
98-20-35
final rule[Correction] Airworthiness Directives; Israel Aircraft Industries (IAI), Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
Unsafe Condition: The unsafe condition involves potential failure of the horizontal stabilizer trim actuator's jackscrew integrity and excessive wear of the tie rod, which could lead to loss of pitch control.