Airworthiness Directive · Amendment 39-18162 · Lycoming Engines Reciprocating Engines (Type Certificate Previously Held by Textron Lycoming Division, AVCO Corporation)
Lycoming Engines Reciprocating Engines (Type Certificate Previously Held by Textron Lycoming Division, AVCO Corporation)
This AD applies to all Lycoming TIO-540-AJ1A reciprocating engines listed by engine serial number (S/N) in Figure 1 to paragraph (c) of this AD and to any TIO-540-AJ1A reciprocating engine with a replacement turbocharger mounting bracket installed that was purchased between April 5, 2012 and May 29, 2014.
| L-6748-61E | L-13828-61E | L-13832-61E | L-13843-61E |
| L-13817-61E | L-13831-61E | L-13833-61E | L-13847-61E |
| L-13819-61E | L-13823-61E | L-13839-61E | L-13855-61E |
| L-13856-61E | L-13947-61E | L-14011-61E | RL-2551-61E |
| L-13857-61E | L-13948-61E | L-14013-61E | RL-2848-61E |
| L-13866-61E | L-13949-61E | L-14014-61E | RL-3450-61E |
| L-13867-61E | L-13950-61E | L-14015-61E | RL-4138-61E |
| L-13873-61E | L-13960-61E | L-14017-61E | RL-7243-61E |
| L-13882-61E | L-13961-61E | L-14024-61E | RL-7512-61E |
| L-13883-61E | L-13962-61E | L-14025-61E | RL-8435-61E |
| L-13884-61E | L-13967-61E | L-14026-61E | RL-8767-61E |
| L-13885-61E | L-13973-61E | L-14028-61E | RL-8914-61E |
| L-13886-61E | L-13975-61E | L-14034-61E | RL-8979-61E |
| L-13895-61E | L-13976-61E | L-14054-61E | RL-9399-61E |
| L-13896-61E | L-13979-61E | L-14055-61E | RL-9466-61E |
| L-13898-61E | L-13981-61E | L-14056-61E | RL-9618-61E |
| L-13900-61E | L-13983-61E | L-14057-61E | RL-9663-61E |
| L-13902-61E | L-13984-61E | L-14062-61E | RL-10098-61E |
| L-13907-61E | L-13993-61E | L-14063-61E | RL-10194-61E |
| L-13913-61E | L-13996-61E | L-14066-61E | RL-10249-61E |
| L-13915-61E | L-13997-61E | L-14067-61E | RL-10615-61E |
| L-13930-61E | L-13998-61E | L-14069-61E | RL-11011-61E |
| L-13931-61E | L-13999-61E | L-14071-61E | RL-12121-61E |
| L-13934-61E | L-14000-61E | L-14076-61E | RL-12163-61E |
| L-13936-61E | L-14001-61E | L-14077-61E | RL-12343-61E |
| L-13938-61E | L-14003-61E | RL-1726-61E | RL-13352-61E |
| L-13939-61E | L-14004-61E | RL-1810-61E | RL-13601-61E |
| L-13946-61E | L-14005-61E | RL-1862-61E |
We are adopting a new airworthiness directive (AD) for certain Lycoming TIO-540-AJ1A reciprocating engines. This AD was prompted by several reports of cracked engine exhaust pipes. This AD requires inspection of the engine exhaust pipes for cracks and replacement of the turbocharger mounting bracket. We are issuing this AD to prevent failure of the exhaust system due to cracking, which could lead to uncontrolled engine fire, harmful exhaust gases entering the cabin resulting in crew incapacitation, and damage to the airplane.
(1) For affected engines with an S/N listed in Figure 1 to paragraph (c) of this AD with 400 hours or less time since new (TSN) or time since last overhaul (TSLO), and for any TIO-540-AJ1A reciprocating engine with a replacement turbocharger mounting bracket installed that was purchased between April 5, 2012 and May 29, 2014, that has accumulated 400 hours or less time-in-service (TIS), within 25 hours after the effective date of this AD, replace the turbocharger mounting bracket with a part eligible for installation, and inspect the exhaust pipes for cracks. Use Lycoming Engines Mandatory Service Bulletin (MSB) No. 614A, dated October 10, 2014, Exhaust System Disassembly and Removal, paragraphs 1 through 22 to replace the bracket, and Exhaust System Inspection, paragraphs 1 through 5 to do the inspection.
(2) For affected engines with an S/N listed in Figure 1 to paragraph (c) of this AD with more than 400 hours TSN or TSLO, and for any TIO-540-AJ1A reciprocating engine with a replacement turbocharger mounting bracket installed that was purchased between April 5, 2012 and May 29, 2014, that has accumulated more than 400 hours TIS, replace the turbocharger mounting bracket with a part eligible for installation, and inspect the exhaust pipes for cracks at the next engine overhaul, separation of the crankcase halves, or twelve years from the effective date of this AD, whichever comes first. Use Lycoming Engines MSB No. 614A, dated October 10, 2014, Exhaust System Disassembly and Removal, paragraphs 1 through 22 to replace the bracket, and Exhaust System Inspection, paragraphs 1 through 5 to do the inspection.
After the effective date of this AD, do not return to service any TIO-540-AJ1A engine with a turbocharger mounting bracket that was removed from an engine identified in Figure 1 to paragraph (c) of this AD or that was purchased between April 5, 2012 and May 29, 2014.
(1) If, before the effective date of this AD, you replaced the turbocharger mounting bracket with one eligible for installation you may take credit for your prior corrective action. No further turbocharger mounting bracket replacement is required.
(2) If, before the effective date of this AD, you performed the crack inspection using either of the following:
(i) Lycoming Engines MSB No. 614A, dated October 10, 2014, Exhaust System Inspection, paragraphs 1 through 5, or
(ii) Cessna Service Letter No. SEL-78-01, dated May 30, 2014, you may take credit for your prior corrective action. No further inspection is required. However, you must still replace the turbocharger mounting bracket.
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.
