Airworthiness Directive · Amendment 39-14722 · Mitsubishi Heavy Industries MU-2B Series Airplanes
Mitsubishi Heavy Industries MU-2B Series Airplanes
Superseded. A later AD replaced this one: AD 2010-10-17. Comply with the one in force.
This AD affects the following airplane models and serial numbers that are certificated in any category:
| Type certificate | Models | Serial Nos. |
|---|---|---|
| (1) A2PC | MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, and MU-2B-26 | 008 through 312, 314 through 320, and 322 through 347. |
| (2) A2PC | MU-2B-30, MU-2B-35, and MU-2B-36 | 501 through 651, 653 through 660, and 662 through 696. |
| (3) A10SW | MU-2B-25, MU-2B-26, MU-2B-26A, and MU-2B-40 | 313SA, 321SA, and 348SA through 459SA. |
| (4) A10SW | MU-2B-35, MU-2B-36, MU-2B-36A, and MU-2B-60 | 652SA, 661SA, and 697SA through 1569SA. |
The FAA adopts a new airworthiness directive (AD) for all Mitsubishi Heavy Industries (MHI) MU-2B series airplanes. This AD requires you to incorporate power assurance charts into the Limitations Section of the Airplane Flight Manual (AFM), inspect the engine torque indication system, and recalibrate the torque pressure transducers as required. This AD results from a recent safety evaluation that used a data-driven approach to analyze the design, operation, and maintenance of the MU-2B series airplanes in order to determine their safety and define what steps, if any, are necessary for their safe operation. Part of that evaluation was the identification of unsafe conditions that exist or could develop on the affected type design airplanes. We are issuing this AD to detect and correct torque transducers that are out of calibration. The above issue, if uncorrected, could result in degraded performance and poor handling qualities with consequent loss of control of the airplane in certain situations.
To address this problem, you must do the following:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Incorporate the following pages from the Airplane Flight Manual (AFM) charts listed in TABLE 3.—AFM INSERTION PAGES, paragraph (f) of this AD, into the Limitations Section of the FAA-approved AFM | Within 100 hours time-in-service (TIS) after September 22, 2006 (the effective date of this AD) | The owner/operator holding at least a private pilot certificate as authorized by section 43.7 of the Federal Aviation Regulations (14 CFR 43.7) may do the flight manual changes requirement of this AD. Make an entry into the aircraft records showing compliance with this portion of the AD in accordance with section 43.9 of the Federal Aviation Regulations (14 CFR 43.9). |
| (2) Inspect the engine torque indication system and recalibrate the torque pressure transducers as required. This inspection requires the use of the power assurance charts referenced in paragraph (e)(1) of this AD and in TABLE 3, paragraph (f) of this AD | Within 100 hours TIS after September 22, 2006 (the effective date of this AD) | (i) For airplanes listed in Type Certificate No. A2PC follow Mitsubishi Heavy Industries, Ltd. (MHI) MV-2 Service Bulletin No. 233A, dated January 14, 1999. (ii) For airplanes listed Type Certificate No. A10SW follow MHI Service Bulletin No. MV-2 095/77-002, dated July 15, 1998. |
(f) Use the following power assurance charts when doing the ground check portion of the inspection required in paragraph (e)(2) of this AD.
| Model of airplane affected | Date and version of AFM | Page number from AFM |
|---|---|---|
| (i) MU-2B | AFM, Section 6, Revision 9, dated January 14, 1999 | 6-34. |
| (ii) MU-2B-15 | AFM, Section 6, Revision 9, dated January 14, 1999 | 6-19. |
| (iii) MU-2B-20 | AFM, Section 6, Revision 9, dated January 14, 1999 | 6-20. |
| (iv) MU-2B-25 | AFM, Section 6, Reissued March 25, 1986; and AFM, Section 6, Revision 9, dated January 14, 1999 | 6-18 and 6-19 6-19. |
| (v) MU-2B-26 | AFM, Section 6, Reissued March 25, 1986; and AFM, Section 6, Revision 9, dated January 14, 1999 | 6-17 and 6-18 6-19. |
| (vi) MU-2B-26A | AFM, Section 6, Reissued March 25, 1986 | 6-17 and 6-18. |
| (vii) MU-2B-35 | AFM, Section 6, Reissued March 25, 1986; and AFM, Section 6, Revision 9, dated January 14, 1999 | 6-18 and 6-19 6-19. |
| (viii) MU-2B-36A | AFM, Section 6, Reissued February 28, 1986 | 6-20 and 6-21. |
| (ix) MU-2B-40 | AFM, Section 6, Reissued March 25, 1986 | 6-17 and 6-18. |
| (x) MU-2B-60 | AFM, Section 6, Reissued September 24, 1985 | 6-19 and 6-20. |
| (xi) MU-2B-10 | AFM, Section 6, Revision 9, dated January 14, 1999 | 6-19. |
| (xii) MU-2B-30 | AFM, Section 6, Revision 10, dated January 14, 1999 | 6-19. |
| (xiii) MU-2B-36 | AFM, Section 6, Revision 9, dated January 14, 1999 | 6-20. |
Note: AFM, Section 6, Reissued March 25, 1986 (FAA-approved) TCDS A10SW. AFM, Section 6, Revision 9 and Revision 10, dated January 14, 1999 (JCAB-approved).
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.
