Airworthiness Directive · Amendment 39-19045 · Reciprocating engine front section
Technify Motors GmbH Reciprocating Engines
This AD applies to Technify Motors GmbH TAE 125-02-99 (commercial designation CD-135, formerly Centurion 2.0) and TAE 125-02-114 (commercial designation CD-155, formerly Centurion 2.0S) reciprocating engines with a gearbox serial number (S/N) listed in Figure 1 to paragraph (c) of this AD.
| 00095 | 00107 | 00139 | 00160 | 00171 | 00172 | 00179 | 00189 | 00224 |
| 00327 | 00396 | 00432 | 00459 | 00481 | 00564 | 00688 | 00697 | 00884 |
| 00923 | 00957 | 01019 | 01048 | 01081 | 01082 | 01106 | 01125 | 01236 |
| 01237 | 01241 | 01245 | 01288 | 01311 | 01314 | 01351 | 01357 | 01361 |
| 01388 | 01418 | 01427 | 01487 | 01529 | 01534 | 01561 | 01598 | 01634 |
| 01655 | 01704 | 01711 | 01755 | 01762 | 01786 | 01844 | 01881 | 01883 |
| 01884 | 01887 | 01891 | 01893 | 01904 | 01928 | 01933 | 01935 | 01951 |
| 01977 | 01978 | 01986 | 02026 | 02040 | 02041 | 02127 | 02141 | 02167 |
| 02189 | 02228 | 02289 | 02298 | 02304 | 02314 | 02316 | 02354 | 02432 |
We are adopting a new airworthiness directive (AD) for certain Technify Motors GmbH TAE 125-02 reciprocating engines. This AD requires replacement of the clutch with a dual mass flywheel. This AD was prompted by a loss of engine power in flight caused by oil leaking from the gearbox radial shaft sealing ring that contaminated the clutch. We are issuing this AD to correct the unsafe condition on these products.
(1) Comply with this AD within the compliance times specified, unless already done.
(2) Within 55 flight hours after the effective date of this AD:
(i) Replace the clutch with a dual mass flywheel. Use Technify Motors Service Bulletin (SB) No. SB TMG 125-1020 P1, Initial Issue, dated January 27, 2016, to do the replacement.
(ii) Install a start phase monitoring system and software mapping in accordance with the requirements of FAA AD 2015-21-01 (80 FR 64314, October 23, 2015); and
(iii) Inspect the rear radial shaft sealing ring on the gearbox for oil leakage in accordance with Figures 2 and 3 of Technify Motors SB No. SB TMG 125-1020 P1, Initial Issue, dated January 27, 2016. If an oil leak is detected, replace the gearbox with a part eligible for installation before the next flight.
After the effective date of this AD:
(1) Do not install an engine that is equipped with a clutch and has an affected gearbox listed in Figure 1 to paragraph (c) of this AD;
(2) Do not install an affected gearbox on an engine unless it has passed the inspection required by paragraph (f)(2)(iii) of this AD; and
(3) Do not install a clutch on an engine previously modified in accordance with the requirements of paragraph (f)(2) of this AD or already incorporating a dual mass flywheel.
