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AD/B747/326 - Flap Control Unit
Boeing 747 Series AeroplanesBoeing 747 Series Aeroplanes
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Boeing 747 Series Aeroplanes
| AD/B747/326 | Flap Control Unit | 5/2005 |
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| Applicability: | Model 747-400, -400D and -400F series aeroplanes, identified in Boeing Alert Service Bulletin (ASB) 747-27A2386, dated 13 March 2003. |
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| Requirement: | 1. Replace at least one flap control unit (FCU) having part number (P/N) 285U0011-207 with a new or modified FCU having P/N 285U0011-208 in accordance with the Accomplishment Instructions of ASB 747-27A2386. |
| Note 1: ASB 747-27A2386 refers to Boeing Component Service Bulletin (CSB) 285U0011-27- 06, dated 13 March 2003, as an additional source of service information for modifying an FCU having P/N 285U0011-207 to P/N 285U0011-208. | |
| 2. For aeroplanes identified in Boeing Service Bulletin (SB) 747-27- 2319, dated 24 January 1991 - Replace the three FCUs having P/N 285U0011-205 or 285U0011-206 with new or modified FCUs having P/N 285U0011-207 in accordance with the Accomplishment Instructions of SB 747-27-2319. | |
| Note 2: SB 747-27-2319 refers to Boeing CSB 285U0011-27-04, dated 24 January 1991, as an additional source of service information for modifying the FCUs having P/N 285U0011-205 or 285U0011-206 to P/N 285U0011-207. | |
| 3. FCUs P/N 285U0011-205 or -206 may not be installed on any aeroplane as a replacement part. | |
| Note 3: FAA AD 2005-04-03 Amdt 39-13975 refers. | |
| Compliance: | For Requirement 1 - At the earlier of the intervals specified below: |
| a. Within 60 months after the effective date of this Directive, | |
| b. Within 25,000 hours time in service after the effective date of this Directive, or | |
| c. Within 4,000 flight cycles after the effective date of this Directive. | |
| For Requirement 2 - Before or concurrent with the accomplishment of Requirement 1. | |
| For Requirement 3 - As of the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 12 May 2005. |
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