AD 70-03-07
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airesearch | Kelowna Flightcraft R & D Ltd. | Auxiliary Power Units | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| aircraft | Airesearch | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| aircraft | Airesearch | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| aircraft | Airesearch | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| appliance | Airesearch | Kelowna Flightcraft R & D Ltd. | Auxiliary Power Units | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| appliance | Airesearch | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| appliance | Airesearch | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
| appliance | Airesearch | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units |
Unsafe Condition
Failure of the AiResearch Model GTP30-141 Auxiliary Power Unit (APU) in flight due to uncommanded shutdown or inability to restart, which could result in loss of electrical power and pressurization.
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Required Actions
Install a placard in full view of the pilot with specific operational instructions. The placard must state: 'Operation of the APU is prohibited in flight, except in emergency. Operate the APU at no load for at least one minute before shutdown.' Remove the placard only after replacing the APU with a series 4 or Change 5 modification per AiResearch Telegraphic Service Bulletin No. 49-A1838 or later FAA-approved revisions.
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Compliance Time
Within ten (10) hours time in service
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Affected Aircraft
AiResearch Model GTP30-141 Auxiliary Power Units installed on Convair 600/640 aircraft listed in AiResearch Telegraphic Bulletin No. 49-A1838 dated January 17, 1970, or later FAA-approved revisions.
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Federal Register Abstract
Auxiliary Power Units
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-03-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-03-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GT...Show more Subject: Auxiliary Power Units Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Airesearch | Kelowna Flightcraft R & D Ltd. Model: Auxiliary Power Units | 240 Series | 340 | 440 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: 70-03-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-936 AD NUMBER: 70-03-07 SUBJECT HEADING: Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-03-07 AIRESEARCH: Amdt. 39-936. Applicable to operators of aircraft with AiResearch model GTP30-141 Auxiliary Power Units installed, including but not limited to, those Convair 600/640 aircraft listed in AiResearch Telegraphic Bulletin No. 49-A1838, dated January 17, 1970, or later FAA approved revisions. Within ten (10) hours time in service, install a placard in full view of the pilot, to read: "Operation of the APU is prohibited in flight, except in emergency. Operate the APU at no load for at least one minute before shutdown." This placard may be removed when the APU is replaced with APU modified to series 4 or Change 5 in accordance with AiResearch Telegraphic Service Bulletin No. 49-A1838, dated January 17, 1970, or later FAA approved revisions. This amendment is effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated January 23, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-03-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-03-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GT...Show more Subject: Auxiliary Power Units Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Airesearch | Kelowna Flightcraft R & D Ltd. Model: Auxiliary Power Units | 240 Series | 340 | 440 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: 70-03-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-936 AD NUMBER: 70-03-07 SUBJECT HEADING: Airworthiness Directives; AiResearch: Applicable To Operators of Aircraft With AiResearch Model GTP30-141 Auxiliary Power Units ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-03-07 AIRESEARCH: Amdt. 39-936. Applicable to operators of aircraft with AiResearch model GTP30-141 Auxiliary Power Units installed, including but not limited to, those Convair 600/640 aircraft listed in AiResearch Telegraphic Bulletin No. 49-A1838, dated January 17, 1970, or later FAA approved revisions. Within ten (10) hours time in service, install a placard in full view of the pilot, to read: "Operation of the APU is prohibited in flight, except in emergency. Operate the APU at no load for at least one minute before shutdown." This placard may be removed when the APU is replaced with APU modified to series 4 or Change 5 in accordance with AiResearch Telegraphic Service Bulletin No. 49-A1838, dated January 17, 1970, or later FAA approved revisions. This amendment is effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated January 23, 1970. FOOTER:
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Retrieved: Apr 8, 2026
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