Airworthiness Directive · Amendment 39-11724 · Mitsubishi Heavy Industries, Ltd. MU-2B Series Airplanes
Mitsubishi Heavy Industries, Ltd. MU-2B Series Airplanes
Superseded. A later AD replaced this one: AD 2000-09-15 R1. Comply with the one in force.
This AD applies to all serial numbers of the following Mitsubishi airplane models, certificated in any category:
MU-2B
MU-2B-10
MU-2B-15
MU-2B-20
MU-2B-25
MU-2B-26
MU-2B-26A
MU-2B-30
MU-2B-35
MU-2B-36
MU-2B-36A
MU-2B-40
MU-2B-60
This amendment adopts a new airworthiness directive (AD) that applies to all Mitsubishi Heavy Industries, Ltd. (Mitsubishi) MU-2B series airplanes. This AD requires modifying the airplanes' operating systems. This AD results from several icing-related incidents and accidents of MU-2B series airplanes, and the Federal Aviation Administration's investigation of the airplane design and pilot's ability to operate in icing conditions. The actions specified by this AD are intended to assist in preventing departure from controlled flight while operating in icing conditions.
Within the next 12 calendar months after July 24, 2000 (the effective date of this AD), you must incorporate the following modifications:
(1) Install a pneumatic deice monitoring system. You must use the procedures contained in Test Instrumentation, Inc. Document No. MU2-5001, Rev. E., dated May 21, 1997; and Mitsubishi MU-2 Service Bulletin (SB) No. 232, dated July 2, 1997.
(2) Install a trim-in-motion alerting system and automatic autopilot disconnect system. Use the procedures contained in Test Instrumentation, Inc. Document No. MU2-1001, Rev. C, dated June 15, 1997; Test Instrumentation, Inc. Document No. MU2-4001, Rev. C, dated June 30, 1997; and Mitsubishi MU-2 SB No. 231, dated July 2, 1997.
(3) Install an auto-ignition (re-light) system. Use the procedures contained in Mitsubishi MU-2 SB No. 226, which incorporates the following pages:
| Pages | Revision level | Date |
|---|---|---|
| 2 through 11, 13 through 23, 27 through 57, and 59 through 93 | A | January 13, 1997. |
| 1, 12, 24, 25, 26, and 58 | B | October 27, 1997. |
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.
