Airworthiness Directive · Amendment 39-16821 · -13-p
Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, 412EP Helicopters
Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters, certificated in any category, with a tail rotor blade (blade) having a part number and serial number, as follows:
| Part No. | Serial No. |
|---|---|
| 204-011-702-015 | AFS-12703, AFS-12893, AFS-23525, or AFS-23573. |
| 204-011-702-121 | A-22020. |
| 212-010-750-105 | *A-11923. |
| 212-010-750-105FM | A-10090, A-10836, *A-10857, A-11207, A-11332, *A-11617, *A-11828, *A-12043, or *A-12091. |
| 212-010-750-113 | A-14953, A-15090, or CS-12702. |
| 212-010-750-113FM | A-12240, *A-12286, A-12296, *A-12398, A-12640, A-12670, A-12789, A-13033, *A-13088, A-13096, *A-13106, A-13134, A-13199, A-13264, A-13366, or *A-13539. |
| 212-010-750-133 | A-15602. |
We are publishing in the Federal Register an amendment which was sent previously to all known U.S. owners and operators that supersedes an existing airworthiness directive (AD) for the specified Bell Helicopter Textron, Inc. (BHT) Model helicopters with certain tail rotor blades (blades). The superseded AD requires, before further flight, replacing certain blades with airworthy blades. This AD retains the requirements of the superseded AD but adds new blade part numbers (P/Ns) and serial numbers (S/Ns) to the applicability. This AD was prompted by another incident in which the blade tip weight separated from a blade during flight, causing vibration. This incident led to the determination that additional blades could be affected, and should be added to the applicability. We are issuing this AD to prevent loss of the blade tip weight, loss of a blade, and subsequent loss of control of the helicopter.
Before further flight, unless accomplished previously.
(f) Replace any affected blade with an airworthy blade. An airworthy blade is one that has a part number and a serial number that is not listed in the Applicability section of this AD.
Note 2: Bell Helicopter Textron Alert Service Bulletin No. 204-07-61, Revision A, dated September 19, 2007, contains additional information about the subject of this AD. Bell Alert Service Bulletin No. 205-07-95, No. 205B-07-46, No. 212-07-125, No. 412CF-07-30, and No. 412-07-123, all Revision B and all dated November 22, 2010, also contain additional information about the subject of this AD. These Alert Service Bulletins are not incorporated by reference.
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.
