AD 74-24-07
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Chromalloy | Rescue Locator Beacons | Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beacons Incorporating Battery Packs |
| appliance | Chromalloy | Rescue Locator Beacons | Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beacons Incorporating Battery Packs |
Unsafe Condition
Chromalloy Model RLB-6 Series Rescue Locator Beacons incorporating battery packs, P/N A3-01-0175, have an unsafe condition due to potential failure of the battery packs, which could result in loss of beacon functionality during emergency situations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service all affected beacons or their battery packs by December 2, 1974. Replace battery packs with P/N P4-01-0044 marked for AD compliance or replace affected beacons with FAA-approved replacements. Alternatively, install an FAA-approved portable emergency locator transmitter accessible to the flight crew until compliance is achieved.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
On or before December 2, 1974
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Affected Aircraft
Chromalloy Model RLB-6 Series Rescue Locator Beacons incorporating battery packs P/N A3-01-0175, installed in emergency equipment such as slide-raft combinations and life rafts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rescue Locator Beacons
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-24-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-24-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beac...Show more Subject: Rescue Locator Beacons Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Chromalloy Model: Rescue Locator Beacons Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-24-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2080 AD NUMBER: 74-24-07 SUBJECT HEADING: Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beacons Incorporating Battery Packs ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-24-07 CHROMALLOY: Amendment 39-2021 as amended by Amendment 39-2080. Applies to Chromalloy Model RLB-6 Series rescue locator beacons incorporating battery packs, P/N A3-01-0175, installed in emergency equipment (including, but not limited to, slide-raft combinations and life rafts). Compliance required as indicated unless already accomplished: (a) On or before December 2, 1974, remove from service all Chromalloy Model RLB-6 Series rescue locator beacons or the battery packs incorporated in those units. (b) Contrary provisions of Sections 121.339, 121.353, and 135.163 of the Federal Aviation Regulations notwithstanding, Part 121 and 135 operators of aircraft, equipped with life rafts or slide-raft combinations incorporating Chromalloy Model RLB-6 Series rescue locator beacons may, after removal of such beacons or their battery packs pursuant to paragraph (A), continue to operate the aircraft (1) After replacing the battery packs with Chromalloy battery packs, P/N P4-01-0044, marked "FAA approved for use only as a replacement battery under AD 74-24-07."; (2) After replacing the affected beacons with FAA approved replacement beacons; or (3) Pending compliance with subparagraphs (1) or (2) of this paragraph, after installing in the aircraft an FAA approved portable type emergency locator transmitter that is accessible to the flight crew. (Note: Chromalloy Model RLB-6 Series rescue locator beacons that incorporate battery packs, P/N P4-01-0044, meet the performance requirements of TSO-C91 except their "low operating temperature" is +29 degrees F). Amendment 39-2021 was effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram, dated November 9, 1974, which contained this amendment. This amendment 39-2080 is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram, dated November 15, 1974, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_74-24-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-24-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beac...Show more Subject: Rescue Locator Beacons Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Chromalloy Model: Rescue Locator Beacons Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-24-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2080 AD NUMBER: 74-24-07 SUBJECT HEADING: Airworthiness Directives; CHROMALLOY: Applies to Chromalloy Model RLB-6 Series Rescue Locator Beacons Incorporating Battery Packs ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-24-07 CHROMALLOY: Amendment 39-2021 as amended by Amendment 39-2080. Applies to Chromalloy Model RLB-6 Series rescue locator beacons incorporating battery packs, P/N A3-01-0175, installed in emergency equipment (including, but not limited to, slide-raft combinations and life rafts). Compliance required as indicated unless already accomplished: (a) On or before December 2, 1974, remove from service all Chromalloy Model RLB-6 Series rescue locator beacons or the battery packs incorporated in those units. (b) Contrary provisions of Sections 121.339, 121.353, and 135.163 of the Federal Aviation Regulations notwithstanding, Part 121 and 135 operators of aircraft, equipped with life rafts or slide-raft combinations incorporating Chromalloy Model RLB-6 Series rescue locator beacons may, after removal of such beacons or their battery packs pursuant to paragraph (A), continue to operate the aircraft (1) After replacing the battery packs with Chromalloy battery packs, P/N P4-01-0044, marked "FAA approved for use only as a replacement battery under AD 74-24-07."; (2) After replacing the affected beacons with FAA approved replacement beacons; or (3) Pending compliance with subparagraphs (1) or (2) of this paragraph, after installing in the aircraft an FAA approved portable type emergency locator transmitter that is accessible to the flight crew. (Note: Chromalloy Model RLB-6 Series rescue locator beacons that incorporate battery packs, P/N P4-01-0044, meet the performance requirements of TSO-C91 except their "low operating temperature" is +29 degrees F). Amendment 39-2021 was effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram, dated November 9, 1974, which contained this amendment. This amendment 39-2080 is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram, dated November 15, 1974, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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