Airworthiness Directive · Amendment 39-17818 · Main hydraulic system
Sikorsky Aircraft Corporation (Sikorsky) Helicopters
Superseded. A later AD replaced this one: AD 2014-07-04 R1. Comply with the one in force.
This AD applies to Model S-92A helicopters, serial numbers 92006 through 920084, certificated in any category.
We are adopting a new airworthiness directive (AD) for Sikorsky Model S-92A helicopters. This AD requires, initially and each time the clamps are removed, inspecting for chafing between the electrical wires and the hydraulic lines and, if there is chafing between the wires or lines, before further flight, replacing the unairworthy wires or lines with airworthy wires or lines. Also, this AD requires inspecting each clamp for correct installation, and if a clamp is incorrectly installed or missing, before further flight, correctly installing the clamps. This AD is prompted by chafing between high voltage electrical wiring and hydraulic lines that led to two fires in the top deck of the helicopter, which does not have fire detection nor extinguishing capability. The actions specified by this AD are intended to detect any chafing between the electrical wires and the hydraulic lines that could result in a fire and subsequent loss of control of the helicopter.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 5 hours time-in-service, inspect the electrical wires and the hydraulic lines in the upper deck of the helicopter for chafing between electrical wires and hydraulic lines. If there is chafing between electrical wires and hydraulic lines, before further flight, replace the unairworthy wires or lines with airworthy wires or lines.
(2) Within 5 hours TIS, inspect each clamp for correct installation as shown in Figures 1 through 14 of Sikorsky Aircraft Corporation Alert Service Bulletin No. 92-20-001, dated October 27, 2005 (ASB). If clamps are incorrectly installed or missing, before further flight, install clamps by following the Accomplishment Instructions, paragraph 3.A.(4) through 3.A.(17) of the ASB.
(3) After each maintenance that requires removing clamps, comply with paragraphs (e)(1) and (e)(2) of this AD.
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.
Aircraft
