Airworthiness Directive · Amendment 39-11924 · British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes
British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes
This AD affects Models HP137 Mk1, Jetstream Series 200 airplanes, and Jetstream Models 3101 and 3201 airplanes, all serial numbers excluding 936 and 940, certificated in any category.
This amendment adopts a new airworthiness directive (AD) that applies to certain British Aerospace HP137 Mk1, Jetstream series 200, and Jetstream Models 3101 and 3201 airplanes. This AD requires you to inspect the rudder quadrant support structure for cracks and correct D- washer installation; and also requires you to replace any cracked component and replace any incorrectly installed D-washers. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the United Kingdom. The actions specified by this AD are intended to detect, correct, and prevent further cracking in the rudder quadrant structure caused by incorrectly installed D-washers. Cracks in this structure could result in loss of rudder control with consequent airplane control problems.
To address this problem, you must accomplish the following:
| Actions | Compliance times | Procedures |
|---|---|---|
| (1) Inspect the upper edge member radii and bottom diaphragm radii adjacent to the rudder artificial feel assembly attachments at the rudder quadrant support for cracks and inspect the D-washers to assure correct installation | Within 90 calendar days after November 27, 2000 (the effective date of this AD) | Accomplish in accordance with the “ACCOMPLISHMENT INSTRUCTIONS: Part 1—Inspection” section of British Aerospace Mandatory Alert Service Bulletin 53-JA-990842, Revision 1, dated February 21, 2000. |
| (2) If cracks are found in the area of the upper edge member radii on the rudder quadrant support structure, replace this component by incorporating material Kit No. ‘53-JA-990842PT2’ | Before further flight after the inspection where the cracked part was detected | Accomplish in accordance with the “ACCOMPLISHMENT INSTRUCTIONS: Part 2—Replacement of the right upper edge member if cracks are found at Part 1” section of British Aerospace Mandatory Alert Service Bulletin 53-JA-990842, Revision 1, dated February 21, 2000. |
| (3) If cracks are found in the area of the bottom diaphragm on the rudder quadrant support structure, replace this component by incorporating material Kit No. ‘53-JA-990842PT3’ | Before further flight after the inspection where the cracked part was detected | Accomplish in accordance with the “ACCOMPLISHMENT INSTRUCTIONS: Part 3—Replacement of the bottom diaphragm of the rudder quadrant support structure” section of British Aerospace Mandatory Alert Service Bulletin 53-JA-990842, Revision 1, dated February 21, 2000. |
| (4) Remove any incorrectly installed D-washer and replace with a new D-washer. This replacement is accomplished by incorporating material Kit No. ‘53-JA-990842PT4’ | Before further flight after the inspection where the incorrect installation was detected | Accomplish in accordance with the “ACCOMPLISHMENT INSTRUCTIONS: Part 4—Removal and replacement of D-washers” section of British Aerospace Mandatory Alert Service bulletin 53-JA-990842, Revision 1, dated February 21, 2000. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
