Airworthiness Directive · Amendment 39-16864 · Honeywell International Inc. Turboshaft Engines
Honeywell International Inc. Turboshaft Engines
This AD applies to Honeywell International Inc. LTS101-600A-2, -3, -3A, and LTS101-700D-2 turboshaft engines with a power turbine governor (PTG) model AL-AB1, part number 4-301-289-03, 4-301-289-05, 4-301-289-09, 4-301-101-16, or 4-301-101-18, installed, that is marked with compliance symbol N or P, or with no compliance symbol, on the PTG identification plate.
We are adopting a new airworthiness directive (AD) for Honeywell International Inc. LTS101-600A-2, -3, -3A, and LTS101-700D-2 turboshaft engines with certain power turbine governors (PTG) model AL- AB1, installed, that are marked with compliance symbol N or P, or with no compliance symbol, on the PTG identification plate. This AD requires initial and repetitive replacements of the affected PTGs. This AD was prompted by reports of two accidents where the engines suddenly lost power and the helicopters had to make emergency autorotation landings, leading to substantial damage to the helicopters. We are issuing this AD to prevent loss of engine power, leading to emergency autorotation landing and damage to the helicopter.
For PTGs that are marked with compliance symbol N, or with no compliance symbol, on the PTG identification plate:
(1) If the PTG has more than 150 operating hours time-since-new (TSN), time-since-overhaul (TSO), or time-since-replacement (TSR), on the effective date of this AD, replace it with a PTG that is eligible for installation, within the next 50 operating hours.
(2) If the PTG has 150 or fewer operating hours TSN, TSO, or TSR, on the effective date of this AD, replace it with a PTG that is eligible for installation, before accumulating 200 total operating hours.
(3) Thereafter, replace it with a PTG that is eligible for installation, within every 200 operating hours TSN, TSO, or TSR.
(i) For PTGs that are marked with compliance symbol P, on the PTG identification plate:
(1) Replace it with a PTG that is eligible for installation, before accumulating 900 operating hours.
(2) Thereafter, replace it with a PTG that is eligible for installation within every 900 operating hours TSN, TSO, or TSR.
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.
Engines
