Airworthiness Directive · Amendment 39-11905 · Raytheon Aircraft Company Beech Models 1900C, 1900C (C-12J), and 1900D Airplanes
Raytheon Aircraft Company Beech Models 1900C, 1900C (C-12J), and 1900D Airplanes
The following airplane models and serial numbers, certificated in any category:
(1) Part I of this AD: Wing fuel quantity wiring harness attachment improvement.
| Model | Serial nos. |
|---|---|
| 1900C | UC-1 through UC-174. |
| 1900C (C-12J) | UD-1 through UD-6. |
| 1900D | UE-1 through UE-331. |
(2) Part II of this AD: Wiggins coupling adhesive sealing.
| Model | Serial nos. |
|---|---|
| 1900C | UC-1 through UC-174. |
| 1900C (C-12J) | UD-1 through UD-6. |
| 1900D | UE-1 through UE-354. |
This amendment adopts a new airworthiness directive (AD) that applies to certain Raytheon Aircraft Company (Raytheon) Beech Models 1900C, 1900C (C-12J), and 1900D airplanes. This AD requires you to install a spiral wrap around the wing fuel quantity wiring harness and apply an adhesive sealant to the Wiggins couplings on the internal fuel tank wiring carry-through conduit. This AD is the result of reports of chafed or shorted wing fuel quantity harness wires on the affected airplanes. These occurrences were found during regular maintenance inspections. The actions specified by this AD are intended to prevent chafing between the wing fuel quantity wiring harness and the internal wing harness supports at each wing rib location, which could cause the fuel quantity indication to become unreliable. This could leave the flight crew without an indication of the amount of fuel the airplane has during flight. The actions are also intended to prevent fuel from leaking through the wiring carry-through conduit and into the wing tip or wheel well area, which could lead to a fire or explosion.
To address this problem, you must accomplish the following actions:
| Action | Compliance time | Procedures |
|---|---|---|
| (1) Part I—Install a spiral wrap around the wing fuel quantity wiring harness; and | Accomplish all actions within the next 3 calendar months after October 31, 2000 (the effective date of this AD) or within the next 600 hours time-in-service (TIS) after October 31, 2000 (the effective date of this AD), whichever occurs first | Accomplish these actions in accordance with Raytheon Mandatory Service Bulletin No. SB 28-3299, Issued: December, 1999. |
| (2) Part II—Apply an adhesive sealant to the Wiggins couplings on the internal fuel tank wiring carry-through conduit. |
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.
