Airworthiness Directive · Amendment 39-16626 · Engine
Cessna Aircraft Company (Cessna) Model 172 Airplanes Modified by Supplemental Type Certificate (STC) SA01303WI
This AD applies to all serial numbers of the following airplanes, certified in any category, that are modified by Supplemental Type Certificate (STC) SA01303WI, as identified in Table 1 of this AD:
| Model | Engine | Group |
|---|---|---|
| (1) 172F, 172G, 172H, 172I, 172K, 172L, 172M, F172F, F172G, F172H, F172K, F172L, and F172M | TAE 125-01 | 1 |
| (2) 172F, 172G, 172H, 172I, 172K, 172L, 172M, F172F, F172G, F172H, F172K, F172L, and F172M | TAE 125-02-99 | 2 |
| (3) 172N, 172P, F172N, and F172P | TAE 125-01 | 3 |
| (4) 172N, 172P, F172N, and F172P | TAE 125-02-99 | 4 |
| (5) 172R and 172S | TAE 125-01 | 5 |
| (6) 172R and 172S | TAE 125-02-99 | 6 |
We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires installing a full authority digital engine control (FADEC) backup battery, replacing the supplement pilot's operating handbook and FAA approved airplane flight manual, and replacing the FADEC backup battery every 12 calendar months. This AD was prompted by an incident where an airplane experienced an in-flight engine shutdown caused by a momentary loss of electrical power to the FADEC. We are issuing this AD to prevent interruption of electrical power to the FADEC, which could result in an uncommanded engine shutdown. This failure could lead to a loss of engine power.
Comply with this AD within the compliance times specified, unless already done.
| Actions | Compliance | Procedures |
|---|---|---|
| (1) For all airplanes: Modify the engine electrical system by installing a backup battery system and associated wiring and circuitry. | Within the next 100 hours time-in-service after May 26, 2011 (the effective date of this AD) or within 30 days after May 26, 2011 (the effective date of this AD), whichever occurs first. | (i) For groups 1, 3, and 5 airplanes: Follow Thielert Aircraft Engines GmbH Service Bulletin TM TAE 601-0007, Revision 8, dated October 14, 2010. (ii) For groups 2, 4, and 6 airplanes: Follow Thielert Aircraft Engines GmbH Service Bulletin TM TAE 601-1001 P1, Revision 8, dated October 14, 2010. |
| (2) For all airplanes: Replace the FADEC backup battery. | Within 12 calendar months after doing the modification required in paragraph (f)(1) of this AD and repetitively thereafter within 12 calendar months after the previous replacement. | (i) For groups 1, 3, and 5 airplanes: Follow Page 8, Revison 2, dated October 8, 2010, from Chapter 24 “Electrical Power” (Chapter 20-AMM-24-01-US) of Thielert Aircraft Engines GmbH Supplement Airplane Maintenance Manual Cessna 172 & Reims F172 TAE 125-01, Doc. No.: AMM-20-01 (US-Version) Version: 2/4. |
| (ii) For groups 2, 4, and 6 airplanes: Follow page 7, Revision 1, dated October 8, 2010, from Chapter 24 “Electrical Power” (Chapter 20-AMM-24-02-US) of Thielert Aircraft Engines GmbH Supplement Airplane Maintenance Manual Cessna 172 & Reims F172 CENTURION 2.0 (TAE 125-02-99), Doc. No.: AMM-20-02 (US-Version) Version: 1/1. | ||
| (3) For groups 1 and 2 airplanes: Incorporate Thielert Aircraft Engines GmbH “Supplemental Airplane Flight Manual or Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement (as applicable) for the Cessna 172 F, G, H, I, K, L, M, Reims Cessna F172 F, G, H, K, L, M, Equipped with TAE 125-01 or TAE 125-02-99 Installation,” Issue 2-1, TAE-Nr.: 20-0310-21042, dated October 4, 2010, into the pilot's operating handbook. | Before further flight after doing the modification required in paragraph (f)(1) of this AD. | Not applicable. |
| (4) For groups 3 and 4 airplanes: Incorporate Thielert Aircraft Engines GmbH “Supplemental Airplane Flight Manual or Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement (as applicable) for the Cessna 172 N & P, Reims Cessna F172 N & P, Equipped with TAE 125-01 or TAE 125-02-99 Installation,” Issue 2-1, TAE-Nr.: 20-0310-20042, dated October 4, 2010, into the pilot's operating handbook. | Before further flight after doing the modification required in paragraph (f)(1) of this AD. | Not applicable. |
| (5) For groups 5 and 6 airplanes: Incorporate Thielert Aircraft Engines GmbH “Supplemental Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement for the Cessna 172 R & S, Equipped with TAE 125-01 or TAE 125-02-99 Installation,” Issue 2-1, TAE-Nr.: 20-0310-22042, dated October 4, 2010, into the pilot's operating handbook. | Before further flight after doing the modification required in paragraph (f)(1) of this AD. | Not applicable. |
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.
