AD 70-12-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN-2 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-2 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-20 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-21 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-26 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-27 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-3 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-6 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-8 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN-2A-9 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN2A MK. III | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN2A MK. III-2 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
| aircraft | B-N Group Ltd. | BN2A MK. III-3 | Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes |
Unsafe Condition
Failure of the flap actuating system due to the use of flap lever drive attachment bolt P/N A111-6G and flap center operating lever P/N NB-45-D-997.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace flap lever drive attachment bolt P/N A111-6G with serviceable bolt P/N A111-9G. Replace flap center operating lever P/N NB-45-D-997 with either modified P/N NB-45-D-2173 (MOD.NB/M/417) per Britten Norman Modification Leaflet No. BN-2/NB/M/417, Part 2, Issue 1, dated April 8, 1970, or later ARB-approved issue, or FAA-approved equivalent, or install serviceable P/N NB-45-D-2173.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours' time in service after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
B-N Group Ltd. Models BN-2 and BN-2A Airplanes, serial numbers up to and including S/N C231.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Flap Actuating System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-12-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-12-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes Subject: Flap Actuating System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/11/1970 Make: B-N Group Ltd. Model: BN-2 | BN-2A | BN-2A-2 | BN-2A-20 | BN-2A-21 | BN-2A-26 | BN-2A-27 | BN-2A-3 | BN-2A-6 | BN-2A-8 | B...Show more 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: 70-12-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1006 AD NUMBER: 70-12-11 SUBJECT HEADING: Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes ACTION: SUMMARY: DATES: Effective June 11, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-12-11 BRITTEN-NORMAN, LTD: Amdt. 39-1006. Applies to BN-2 and BN-2A airplanes, serial numbers up to and including S/N C231. Compliance is required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished. To prevent failure of the flap actuating system, replace flap lever drive attachment bolt P/N A111-6G with a serviceable bolt, P/N A111-9G, and replace the flap center operating lever P/N NB-45-D-997 with either - (1) A serviceable flap center operating lever P/N NB-45-D-997 modified and remarked as P/N NB-45-D-2173 (MOD.NB/M/417) in accordance with Britten Norman Modification Leaflet No. BN-2/NB/M/417, Part 2, Issue 1, dated April 8, 1970, or a later ARB- approved issue or an FAA-approved equivalent; or (2) A serviceable flap center operating lever P/N NB-45-D-2173. This amendment becomes effective June 11, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-12-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-12-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes Subject: Flap Actuating System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/11/1970 Make: B-N Group Ltd. Model: BN-2 | BN-2A | BN-2A-2 | BN-2A-20 | BN-2A-21 | BN-2A-26 | BN-2A-27 | BN-2A-3 | BN-2A-6 | BN-2A-8 | B...Show more 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: 70-12-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1006 AD NUMBER: 70-12-11 SUBJECT HEADING: Airworthiness Directives; Britten Norman Models BN-2 and BN-2A Airplanes ACTION: SUMMARY: DATES: Effective June 11, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-12-11 BRITTEN-NORMAN, LTD: Amdt. 39-1006. Applies to BN-2 and BN-2A airplanes, serial numbers up to and including S/N C231. Compliance is required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished. To prevent failure of the flap actuating system, replace flap lever drive attachment bolt P/N A111-6G with a serviceable bolt, P/N A111-9G, and replace the flap center operating lever P/N NB-45-D-997 with either - (1) A serviceable flap center operating lever P/N NB-45-D-997 modified and remarked as P/N NB-45-D-2173 (MOD.NB/M/417) in accordance with Britten Norman Modification Leaflet No. BN-2/NB/M/417, Part 2, Issue 1, dated April 8, 1970, or a later ARB- approved issue or an FAA-approved equivalent; or (2) A serviceable flap center operating lever P/N NB-45-D-2173. This amendment becomes effective June 11, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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