AD 74-11-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace Corporation | G-1159 | Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 |
Unsafe Condition
The fire extinguisher circuits may fail due to insufficient redundancy in the electrical squib circuits, which could prevent activation of the fire extinguishing system during an emergency.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace left and right fire extinguisher switches MS24523-21 with MS24524-21 switches, wire switches according to Grumman Gulfstream II Aircraft Service Change 121, and replace pilot's circuit breaker panel nameplate 1159AV2042 with 1159SB20082-11.
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Compliance Time
within the next 100 hours time in service after the effective date of this AD
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Affected Aircraft
Grumman American Aviation Corporation Model G-1159, serial numbers 1 through 110 and 775 except 91 and 95
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Federal Register Abstract
Fire Extinguisher Circuits
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-11-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-11-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Subject: Fire Extinguisher Circuits Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/24/1974 Make: Gulfstream Aerospace Corporation Model: G-1159 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-11-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1849 AD NUMBER: 74-11-05 SUBJECT HEADING: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 ACTION: SUMMARY: DATES: Effective May 24, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-11-05 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 1849. Applies to Grumman G-1159, Serial Number 1 through 110 and 775 except 91 and 95, certificated in all categories. Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished. To provide dual electrical fire extinguisher squib circuits, accomplish the following or an equivalent rework approved by the Chief, Engineering and Manufacturing Branch, Southern Region. Remove the left and right fire extinguisher switches MS24523-21 and install MS24524- 21 switches in their place. Wire switches in accordance with Grumman Gulfstream II Aircraft Service Change 121. Replace pilot's circuit breaker panel nameplate 1159AV2042 with nameplate 1159SB20082-11. This rework is outlined in detail in the Grumman Gulfstream II Aircraft Service Change 121. This amendment is effective May 24, 1974. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_74-11-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-11-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 Subject: Fire Extinguisher Circuits Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/24/1974 Make: Gulfstream Aerospace Corporation Model: G-1159 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: 74-11-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1849 AD NUMBER: 74-11-05 SUBJECT HEADING: Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 ACTION: SUMMARY: DATES: Effective May 24, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-11-05 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 1849. Applies to Grumman G-1159, Serial Number 1 through 110 and 775 except 91 and 95, certificated in all categories. Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished. To provide dual electrical fire extinguisher squib circuits, accomplish the following or an equivalent rework approved by the Chief, Engineering and Manufacturing Branch, Southern Region. Remove the left and right fire extinguisher switches MS24523-21 and install MS24524- 21 switches in their place. Wire switches in accordance with Grumman Gulfstream II Aircraft Service Change 121. Replace pilot's circuit breaker panel nameplate 1159AV2042 with nameplate 1159SB20082-11. This rework is outlined in detail in the Grumman Gulfstream II Aircraft Service Change 121. This amendment is effective May 24, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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