Flap Assembly Screw Jack — Inspection
- Published
- Effective
- Deadline
- Replaces
- 750XL/38
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect the left-hand and right-hand flap screw jack assemblies within the next 5 hours time-in-service using the instructions in Part A of MSB PACSB/XL/117 issue 2 or later approved revisions. If assemblies are found incorrectly assembled, corrective actions in Part B of the service bulletin must be completed before further flight. No flap assembly screw jack parts with P/N 11-45621-1 or 11-45622-1 may be installed unless compliant with this AD. Inspections may be performed by appropriately authorized pilots or maintenance engineers as specified.
Summary
The Airworthiness Directive DCA/750XL/38A Flap Assembly Screw Jack – Inspection issued by the Civil Aviation Authority of New Zealand mandates inspection of flap screw jack assemblies on Pacific Aerospace Limited 750XL aircraft, specifically serial numbers 101 through 215, 220, 8001, and 8002, as well as spare parts with part numbers 11-45621-1 and 11-45622-1. This directive addresses potential incorrect assembly of the flap screw jack bearing retainer and stop, which could lead to fatigue failure. Compliance with the inspection and corrective actions outlined in Pacific Aerospace Mandatory Service Bulletin PACSB/XL/117 issue 2 is required.
What changed
This directive revises the previous AD DCA/750XL/38 by introducing the updated Pacific Aerospace Mandatory Service Bulletin PACSB/XL/117 issue 2 dated 21 August 2019. It expands applicability to include additional aircraft serial numbers and spare parts. The revision corrects the orientation error of the flap screw jack bearing stop found in the maintenance and illustrated parts manuals.
Why it matters
This AD is critical for aviation professionals to prevent potential flap screw jack fatigue failure caused by incorrect assembly, which could compromise flight safety. Operators and maintenance organizations must ensure inspections and corrective actions are performed promptly to maintain airworthiness. Compliance helps avoid unplanned maintenance and potential flight restrictions due to unsafe conditions.
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- EASA AD DCA-750XL-36Fuel Pickup Assembly and Wing Spar Web — InspectionFeb 1, 2019
- EASA AD DCA-750XL-34Port Wing Internal Tank Abrasion — InspectionFeb 1, 2019
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