Airworthiness Directive · Amendment 39-13856 · Raytheon Aircraft Company Model B100 Airplanes
Raytheon Aircraft Company Model B100 Airplanes
This AD affects Model B100 airplanes, serial numbers BE-1 through BE-136, that are certificated in any category.
The FAA adopts a new airworthiness directive (AD) for certain Raytheon Aircraft Company (Raytheon) Model B100 airplanes. This AD requires you to drill holes in the hot lip tube "B" nuts, tighten the "B" nuts to specified torque ranges, and secure the "B" nuts with safety wire. This AD is the result of reports of loose "B" nuts on the engine inlet that may loosen and permit a leak in the engine inlet anti-ice system. We are issuing this AD to detect and correct loose "B" nuts on the engine inlet, which could result in failure of the engine inlet anti-ice system and consequent ice buildup. This failure and ice buildup could lead to an engine's ingestion of ice with loss of engine power or loss of engine.
To address this problem, you must do the following:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Drill a 0.035-inch hole in each of the hot tube “B” nuts (part number (P/N) AN818-6D and AN818-8D). | Within the next 150 hours time-in-service (TIS) or 6 calendar months after December 27, 2004 (the effective date of this AD), whichever occurs first. | Follow Raytheon Aircraft Mandatory Service Bulletin No. SB 30-3143, dated September 2001. The applicable airplane maintenance manual also addresses this issue. |
| (2) Tighten the hot lip tube “B” nuts to a specified torque range: (i) Tighten hot lip tube “B” nuts P/N AN818-6D to a torque range of 75 to 125 inch-pounds. (ii) Tighten hot lip tube “B” nuts P/N AN818-8D to a torque range of 150 to 250 inch-pounds. | Before further flight after the actions required by paragraph (e)(1) of the AD. | Follow Raytheon Aircraft Mandatory Service Bulletin No. SB 30-3143, dated September 2001. The applicable airplane maintenance manual also addresses this issue. |
| (3) Secure the hot lip tube “B” nuts (P/N AN818-6D and AN818-8D) with safety wire. | Before further flight after the actions required by paragraph (e)(2) of this AD. | Follow Raytheon Aircraft Mandatory Service Bulletin No. SB 30-3143, dated September 2001. The applicable airplane maintenance manual also addresses this issue. |
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.
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