| AD Number | 67-28-02 | Status | Active |
| Effective Date | January 11, 1970 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-911 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Airbus SAS |
| Model(s) | BAC 1-11 200 Series BAC 1-11 400 Series |
67-28-02 BRITISH AIRCRAFT: Amdt. 39-490 as amended by Amdt. 39-911. Applies to Model BAC 1-11, 200 and 400 Series airplanes.
Compliance required as indicated.
To prevent deterioration of the secondary flap transmission system due to corrosion in the magnesium bearing housings, accomplish the following:
(a) Within the next 250 hours' time in service after the effective date of this AD for airplanes with 2,750 or more hours' time in service, or for airplanes with less than 2,750 hours' time in service as of the effective date of this AD before the accumulation of 3,000 hours' time in service, and thereafter at intervals not to exceed 600 hours' time in service from the last inspection, visually inspect the support bearings in the flap secondary transmission shafting for signs of corrosion or stiffness in accordance with British Aircraft Corporation BAC 1-11 Alert Service Bulletin No. 27-A-PM 2757, Issue 1, or later ARB-approved issue, or an FAA-approved equivalent.
(b) If signs of corrosion or stiffness are found during the inspection required by paragraph (a), remove and dismantle the affected bearing assembly and inspect the interior of the bearing housing. If any corrosion is found, replace bearing housing before further flight with an unused magnesium bearing housing of the same part number or with an aluminum alloy bearing housing, in accordance with BAC 1-11 Service Bulletin No. 27-PM 2757 or later ARB-approved issue, or an FAA-approved equivalent.
(c) The repetitive inspections required by paragraph (a) may be made at intervals not to exceed 3,000 hours' time in service from the last inspection after the bearing assembly has been inspected in accordance with paragraph (b) and reassembled with the original magnesium bearing housing or an unused replacement magnesium bearing housing and the space between the bushings is coated with Jointing Compound J.C. 5A (VX3-100/200) or U.S. equivalent Hylomar SQ32(L) or SQ32(M).
(d) When a particular magnesium bearing housing is replaced with an aluminum alloy bearing housing in accordance with BAC 1-11 Service Bulletin 27-PM 2757 or later ARB- approved issue, or an FAA-approved equivalent, the repetitive inspection of that support bearing required by paragraph (a) may be discontinued.
(e) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Aircraft Certification Staff, FAA Europe, Africa, and Middle East Region may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the
Amendment 39-490 effective November 4, 196
This amendment (39-911) becomes effective January 11, 1970.