A contract mechanic was directed to use an engineering order that allowed the use of naphtha fluid; ...

Attributes
ACN	1018632
Time
Date	201206
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Electrical Distribution
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Avionics Maintenance Airframe
Experience	Maintenance Avionics 6 Maintenance Inspector 1 Maintenance Lead Technician 1 Maintenance Technician 2
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

While working on aircraft X; I was told to use an engineering repair order (ero) X to clean a contaminated insulation blanket; that goes inside the electrical equipment (east/east) compartment. When I tried to pull the ero up on the computer system; the system said there was not one available. A supervisor had to print it out from his e-mail so I could do my job. This ero changes the aircraft maintenance manual (amm) from no cleaning with solvents allowed on insulation blankets; to using naphtha (a highly flammable solvent) to clean insulation blankets. When cleaning the blankets I noticed wherever the naphtha was applied; a shiny residue was left behind. I now know there is a regulation for the burn rate for the insulation and I believe the burn rate has now been damaged.

Original NASA ASRS Text

Title: A Contract Mechanic was directed to use an Engineering Order that allowed the use of Naphtha fluid; a highly flammable solvent; to clean their aircraft insulation blankets; including the blankets in the Electrical Equipment (E/E) compartment.

Narrative: While working on Aircraft X; I was told to use an Engineering Repair Order (ERO) X to clean a contaminated insulation blanket; that goes inside the Electrical Equipment (E/E) compartment. When I tried to pull the ERO up on the computer system; the system said there was not one available. A Supervisor had to print it out from his e-mail so I could do my job. This ERO changes the Aircraft Maintenance Manual (AMM) from no cleaning with solvents allowed on insulation blankets; to using Naphtha (a highly flammable solvent) to clean insulation blankets. When cleaning the blankets I noticed wherever the Naphtha was applied; a shiny residue was left behind. I now know there is a regulation for the burn rate for the insulation and I believe the burn rate has now been damaged.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

A contract mechanic was directed to use an engineering order that allowed the use of naphtha fluid; a highly flammable solvent; to clean their aircraft insulation blankets; including the blankets in the electrical equipment (east/east) compartment.