# AD 72-06-01: Flap Section Pickup Assembly - Type: Airworthiness directive - Status: Current - Products: Airbus BAC 1-11 200 Series and BAC 1-11 400 Series - Effective: April 6, 1972 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-1406 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/709813C9F42D0832862569A4006AFE9B.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/72-06-01 ## The airworthiness directive 72-06-01 BRITISH AIRCRAFT CORPORATION: Amdt. 39-1406. Applies to Model BAC 1-11 200 and 400 series airplanes which do not have BAC Modification PM 4621 Part (b) incorporated on all flap sections. Compliance is required as indicated. To prevent failures of the flap forward inboard pick-up fitting assemblies (six per airplane), accomplish the following: (a) For flap sections with a pick-up fitting assembly with a spigot having P/N AB09- 1723 (pre-Mod. 4621) installed: (1) Remove the lower inboard access panel and visually inspect the pick-up fitting assembly for failure of the spigot in accordance with British Aircraft Corporation Model BAC 1-11 Alert Service Bulletin No. 57-A-PM 4621, Issue 2, dated July 27, 1970 or an FAA-approved equivalent as follows: (i) On the inboard (No. 1) flap sections, within the next 650 landings after the effective date of this AD, or before the accumulation of 7,500 landings on the pick-up fitting assembly spigot, whichever occurs later, and thereafter at intervals not to exceed 650 landings from the last inspection until the spigot is replaced in accordance with paragraph (a)(4)(ii), or the assembly is replaced in accordance with paragraph (a)(4)(iii). (ii) On the center (No. 2) and outboard (No. 3) flap sections, within the next 2,000 landings after the effective date of this AD, or before the accumulation of 7,500 landings on the pick-up assembly spigot, whichever occurs later, and thereafter at intervals not to exceed 2,000 landings from the last inspection until the spigot is replaced in accordance with paragraph (a)(4)(ii), or the assembly is replaced in accordance with paragraph (a)(iii). (2) If a failed spigot is found during an inspection required by paragraph (a)(1), before further flight comply with paragraph (a)(4). (3) Within the next 1,000 landings after the effective date of this AD or before the accumulation of 25,000 landings on the pick-up assembly spigot, whichever occurs later, comply with paragraph (a)(4). (4) Comply with either subparagraph (i), (ii), or (iii). (i) Replace an affected spigot with a serviceable spigot of the same part number and continue to inspect in accordance with paragraph (a) (1); or (ii) Replace an affected spigot with an improved spigot, P/N AB09- 3887 (BAC Modification PM 4621, Part (a) in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 57-PM 4621, Issue 1, dated May 18, 1970 or an FAA-approved equivalent and inspect in accordance with paragraph (b)(1); or (iii) Replace the assembly containing the affected spigot with a new assembly (BAC Modification PM 4621, Part (b)) in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 57-PM 4621, Issue 1, dated May 18, 1970 or an FAA- approved equivalent. (b) For flap sections with a pick-up fitting assembly with a spigot having P/N AB09- 3887 (post-Mod. 4621, Part (a)) installed: (1) Remove the lower inboard access panel and visually inspect the pick-up fitting assembly for failure of the spigot in accordance with British Aircraft Corporation Model BAC 1-11 Alert Service Bulletin No. 57-A-PM 4621, Issue 2, dated July 27, 1970 or an FAA-approved equivalent as follows: (i) On the inboard (No. 1) flap sections, within the next 650 landings after the effective date of this AD or before the accumulation of 20,000 landings on the pick-up fitting assembly spigot, whichever occurs later, and thereafter at intervals not to exceed 650 landings from the last inspection until the assembly is replaced in accordance with paragraph (b)(4)(ii). (ii) On the center (No. 2) and outboard (No. 3) flap sections, within the next 2,000 landings after the effective date of this AD or before the accumulation of 20,000 landings on the pick-up fitting assembly, whichever occurs later, and thereafter at intervals not to exceed 2,000 landings from the last inspection, until the assembly is replaced in accordance with paragraph (b)(4)(ii). (2) If a failed spigot is found during an inspection required by paragraph (b)(1), before further flight comply with paragraph (b)(4). (3) Within the next 1,000 landings after the effective date of this AD or before the accumulation of 30,000 landings on the pick-up assembly, whichever occurs later, comply with paragraph (b)(4). (4) Comply with either subparagraph (i) or (ii). (i) Replace an affected spigot with a serviceable spigot of the same part number and continue to inspect in accordance with paragraph (b)(1); or (ii) Replace the assembly containing the affected spigot with a new assembly (BAC Modification PM 4621, Part (b)) in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 57-PM 4621, Issue 1, dated May 18, 1970 or an FAA- approved equivalent. This amendment becomes effective April 6, 1972. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A5EU](https://openairdocs.org/tcds/A5EU): Airbus SAS; names 2 of 2 models: BAC 1-11 200 Series, BAC 1-11 400 Series ## Registered aircraft it may apply to (OpenAirDocs) No registered aircraft matched the models it names. Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.