| AD Number | 92-06-12 | Status | Active |
| Effective Date | April 13, 1992 | Issue Date | Not specified |
| Docket Number | 90-ASW-48 | Amendment | 39-8192 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Bell Helicopter Textron Canada Limited |
| Model(s) | 206A 206B 206L 206L-1 206L-3 |
92-06-12 BELL HELICOPTER TEXTRON, INC.: Amendment 39-8192. Docket No. 90-ASW-48.
Applicability: All Model 206A, 206B, 206L, 206L-1, and 206L-3 helicopters, certificated in any category, with the main transmission sungear, part number (P/N) 206-040-662-101, installed.
Compliance: Required as indicated, unless already accomplished.
To prevent premature wear of the sungear and mating spur gears which could result in transmission failure, accomplish the following:
(a) At the next inspection interval for the main transmission sungear, P/N 206-040-662-101, but no later than 1,500 hours' time in service after the effective date of this AD, remove and replace sungears which have the following serial numbers:
SD-0005
SD-0010
SD-0020
SD-0022
SD-0023
SD-0024
SD-0025
SD-0026
SD-0027
SD-0031
SD-0033
SD-0034
SD-0035
SD-0036
SD-0037
SD-0039
SD-0040
SD-0043
SD-0044
SD-0046
SD-0054
SD-0055
SD-0057
SD-0060
SD-0062
SD-0065
SD-0066
SD-0067
SD-0068
SD-0069
SD-0071
(b) In conjunction with (a), inspect the pinion spur gears which mate with the above listed sungears for micro pitting or hardlines in the gear teeth due to the insufficient tip relief, or improper tooth profile of the sungear. Determine if wear or damage is within specified limits according to the applicable BHTI maintenance, repair and overhaul manuals.
(c) If wear or damage exceeds the specified limits, remove and replace the affected spur gears with serviceable parts before further flight.
(d) An alternative method of compliance or adjustment of the compliance times which provides an acceptable level of safety may be used if approved by the Manager, Rotorcraft Certification Office, ASW-170, Rotorcraft Directorate, Aircraft Certification Service, FAA, Fort Worth, Texas, 76193-0170.
(e) Bell Helicopter Textron, Inc., Alert Service Bulletins No. 206-90-56, Rev. A, dated 1/15/91 or 206L-90-69, Rev. A, dated 1/15/91, as applicable, provide an acceptable, alternate means of compliance with this AD.
(f) This amendment becomes effective on April 13, 1992.