Airworthiness Directive · Amendment 39-14796 · Turbomeca Turmo IV A and IV C Series Turboshaft Engines
Turbomeca Turmo IV A and IV C Series Turboshaft Engines
Superseded. A later AD replaced this one: AD 2009-02-08. Comply with the one in force.
This AD applies to Turbomeca Turmo IV A and IV C series turboshaft engines with flexible lubrication pipes, part number (P/N) 0 249 92 813 0 or P/N 0 249 92 916 0, installed. These engines are installed on but not limited to, Aerospatiale SA 330—PUMA helicopters.
The FAA is adopting a new airworthiness directive (AD) for Turbomeca Turmo IV A and IV C series turboshaft engines. This AD requires identifying, inspecting and replacing flexible lubrication pipes manufactured after April 1, 2003. If both engines on the same helicopter each have an affected pipe, then this AD requires replacing one of the affected pipes before further flight. This AD also requires initial and repetitive borescope inspections of affected pipes, visual inspections for oil leakage, and visual inspections of the oil filter, on engines that are not required to have an affected pipe replaced before further flight by this AD. This AD results from 7 reports of oil leakage due to the deterioration of flexible lubrication pipes manufactured after April 1, 2003. We are issuing this AD to prevent dual-engine failure on a twin-engine helicopter.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
Initial Actions
(f) Before further flight:
(1) Identify the curing batch of the flexible lubrication pipes.
(2) If the two engines installed on the same helicopter have pipes with a curing batch of “2T03” (meaning 2nd quarter of 2003) or subsequent batch, replace one of the pipes with a pipe having a curing batch before batch “2T03”.
(3) On the other engine, or on a helicopter that has only one engine affected by this AD, borescope-inspect the pipe for deterioration, visually inspect for oil leakage, and visually inspect the oil filter for black particle deterioration from the pipe. Replace the pipe if deterioration or leakage is found, with a pipe having a curing batch before batch “2T03”.
Within every additional 25 operating hours, on engines still having an affected flexible lubrication pipe, borescope-inspect the pipe for deterioration, visually inspect pipe for oil leakage, and visually inspect the oil filter for black particle deterioration from the pipe. Replace the pipe if deterioration or leakage is found, with a pipe having a curing batch before batch “2T03”.
(h) Information on performing the initial and repetitive actions in this AD can be found in Turbomeca Alert Mandatory Service Bulletin No. A249 72 0802, Update No. 1, dated August 3, 2006.
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
