NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
10-4.8. T R E A T M E N T AFTER EXPOSURE TO
b. Place equipment in oven and dry at approximately
VOLCANIC ASH. The primary concern in removing
130F (54C) for 1 to 2 hours.
volcanic ash is the extreme abrasiveness of the ash. It
is not a significantly corrosive material. Aircraft which
have been exposed to volcanic ash should be cleaned
using the following procedures after exposure and
Compound, Corrosion Preventative 3
before the next aircraft operation or flight:
Water-Displacing
MIL-C-81309
a. All static ports, fuel vents, engine inlets, air
conditioning inlets, or openings shall be vacuumed to
c. (N)(A) For all avionic components and electrical
remove as much ash as possible and then suitably
connectors, apply by spraying Water-Displacing
covered to preclude additional ash entry. Special
Corrosion Preventive Compound, Ultra-Thin Film,
emphasis should be placed on ducting supplying cooling
Avionics Grade, MIL-C-81309 Type III (Volume IV,
air to avionics equipment.
b. After covering all openings where ash may enter,
d. (AF) For all avionic components and electrical
the exterior of the airframe or equipment should have
connectors, apply by spraying Water-Displacing
ash removed using vacuum, low pressure air, or by
Corrosion Preventive Compound, Ultra-Thin Film,
lightly dusting with clean rags. Avoid rubbing since this
Avionics Grade, MIL-C-81309 Type III, or Water
may damage surfaces due to the abrasiveness of the
Displacing Lubricant and Corrosion Preventive
ash.
Compound, MIL-L-87177 Type I or II Grade B (Volume V,
c. Clean and lubricate entire aircraft or component
in accordance with Volume II (Navy and Army) or
10-5.2.2. Vacuum Oven Drying.
TO 1-1-691 (Air Force.)
WARNING
10-5. EMERGENCY DRYING AND PRESERVA-
TION.
Compressed air used for drying can create
airborne particles that may enter the eyes.
10-5.1. GENERAL. Drying and preservation are
Pressure shall not exceed 10 psi. Eye protection
essential to eliminate any traces of water and control
is required.
corrosion until equipment is received at next higher
level of maintenance.
a. Blow off excess liquid with not more than 10 psi
dry air pressure or dry nitrogen. Deflect jet of air off
10-5.2. D R Y I N G
AND
PRESERVATION
interior, back, and sides of enclosure to diffuse.
PROCEDURES. The following drying and preservation
procedures shall be used in accordance with availability
b. Place equipment in oven and dry at approximately
of special equipment.
130F (54C) and a minimum of 25 in. Hg for 1 to 2
hours.
10-5.2.1. Vented Drying Oven (Forced Air).
WARNING
Compound, Corrosion Preventative 3
Compressed air used for drying can create
Water-Displacing
airborne particles that may enter the eyes.
MIL-C-81309
Pressure shall not exceed 10 psi. Eye protection
is required.
c. (N)(A) After completion of drying step for all
avionic components, apply Water-Displacing Corrosion
a. Blow off excess liquid with not more than 10 psi
Preventive Compound, Ultra-Thin Film, Avionics Grade,
dry air pressure or dry nitrogen. Deflect jet of air off
MIL-C-81309 Type III (Volume IV, Chapter 2).
interior, back, and sides of enclosure to diffuse.
