Accession Number:

ADA618780

Title:

Impact Analysis on the Removal of Filter/Monitors from USN/USMC Helicopter in Flight Refueling Systems

Descriptive Note:

Research rept. 9-25 Sep 2013

Corporate Author:

NAVAL AIR SYSTEMS COMMAND PATUXENT RIVER MD FUELS AND LUBRICANTS DIV

Report Date:

2013-09-26

Pagination or Media Count:

14.0

Abstract:

The USAF released a message in July 2005 that stated recent single engine flame-out incidents involving three trainer aircraft had occurred, the root cause of the problem had been aircraft filter plugging, and that all water absorbing filters were being removed from service. The investigation by the USAF following the incident indicated that the super absorbent polymer SAP used in manufacturing the filtermonitors had migrated downstream and had collected in engine fuel filters and controls, possibly causing the flame-out incidents. In response to these events, the Navy Fuels Team initiated an investigation into the migration of SAP downstream of filtermonitors, and the resulting risk to aircraft fuel system operation. In June 2007, the Navy Fuels Team released NAVAIRSYSCOM Report 44107-002 that recommended removal of all monitors from land based refueling systems. The report also recommended that a separate risk analysis be performed on the use of filtermonitors containing SAP in helicopter in flight refueling HIFR systems. The utilization of monitors in HIFR applications is significantly different than in land-based fueling systems and therefore warrants its own risk assessment. This report identifies the risks and provides recommendations.

Subject Categories:

  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE