AD 91-05-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN-2T | Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes |
| aircraft | B-N Group Ltd. | BN-2T-4R | Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes |
Unsafe Condition
Failure of the electrical system circuit breakers to prevent undetected circuit breaker trips, which could result in inability to restart engines in flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the airplane electrical system in accordance with PBN Service Bulletin BN2/SB 194. Special flight permits may be obtained under FAR 21.197 and 21.199 to operate to a location where the modification can be done. Alternate methods of compliance or compliance time adjustments may be approved by the Manager, Brussels Aircraft Certification Staff.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 200 hours time-in-service (TIS) after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
PILATUS BRITTEN-NORMAN (PBN) Model BN-2T Turbine Islander airplanes (all serial numbers) without PBN Modification Number NB/M/1415 incorporated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Electrical System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_91-05-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-05-07 Document Type: AD Final Rules Docket Number: 90-CE-32-AD Subject Heading: Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes Subject: Electrical System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/25/1991 Make: B-N Group Ltd. Model: BN-2T | BN-2T-4R Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 91-05-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-CE-32-AD AMENDMENT: 39-6891 AD NUMBER: 91-05-07 SUBJECT HEADING: Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes ACTION: SUMMARY: DATES: Effective March 25, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-05-07 PILATUS BRITTEN-NORMAN (PBN): Amendment 39-6891. Docket No. 90-CE-32-AD. Applicability: Model BN-2T Turbine Islander airplanes (all serial numbers), certificated in any category, that do not have PBN Modification Number NB/M/1415 incorporated. Compliance: Required within the next 200 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished. To ensure the ability to restart the engines in flight if an undetected circuit breaker trip does occur, accomplish the following: (a) Modify the airplane electrical system in accordance with the instructions in PBN Service Bulletin BN2/SB 194, dated April 11, 1990. (b) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a location where the requirements of this AD can be accomplished. (c) An alternate method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Brussels Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, B-1000 Brussels, Belgium. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels Aircraft Certification Staff. (d) All persons affected by this directive may obtain copies of the document referred to herein upon request to Pilatus Britten-Norman Limited, Bembridge Airport, Isle of Wight, PO36 5PR, England; or may examine this document at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. This amendment (39-6891, AD 91-05-07) becomes effective on March 25, 1991. FOOTER:
Document Text
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AD Final Rules - DRS_91-05-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-05-07 Document Type: AD Final Rules Docket Number: 90-CE-32-AD Subject Heading: Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes Subject: Electrical System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/25/1991 Make: B-N Group Ltd. Model: BN-2T | BN-2T-4R Product Type: Aircraft Product Subtype: Small 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: 91-05-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-CE-32-AD AMENDMENT: 39-6891 AD NUMBER: 91-05-07 SUBJECT HEADING: Airworthiness Directives; PILATUS BRITTEN-NORMAN (PBN): Model BN-2T Turbine Islander Airplanes ACTION: SUMMARY: DATES: Effective March 25, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-05-07 PILATUS BRITTEN-NORMAN (PBN): Amendment 39-6891. Docket No. 90-CE-32-AD. Applicability: Model BN-2T Turbine Islander airplanes (all serial numbers), certificated in any category, that do not have PBN Modification Number NB/M/1415 incorporated. Compliance: Required within the next 200 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished. To ensure the ability to restart the engines in flight if an undetected circuit breaker trip does occur, accomplish the following: (a) Modify the airplane electrical system in accordance with the instructions in PBN Service Bulletin BN2/SB 194, dated April 11, 1990. (b) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a location where the requirements of this AD can be accomplished. (c) An alternate method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Brussels Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, B-1000 Brussels, Belgium. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels Aircraft Certification Staff. (d) All persons affected by this directive may obtain copies of the document referred to herein upon request to Pilatus Britten-Norman Limited, Bembridge Airport, Isle of Wight, PO36 5PR, England; or may examine this document at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. This amendment (39-6891, AD 91-05-07) becomes effective on March 25, 1991. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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