Supply/Parts and Disposition

TB 1-2840-229-20-17

(1) Conducting operations at night only for essential missions and/or to maintain proficiency.

Minimum of 1000 feet AGL on night unaided flights, except during takeoff and landings.

(2) Avoiding prolonged operations inside the avoid or caution regions, as defined in the

appropriate height velocity diagram (Figure 9-3 or 9-3.1 of TM 55-1520-236-10), except when both of the

following conditions have been satisfied:

(a) The flight crew has been trained on all AH-1 Spur Gear failure recognition and

emergency actions.

(b) The flight will be conduced in an area which contains suitable landing areas.

(3) Not operating in areas where "land as soon as possible" could not be accomplished (extensive

swamps, forests, etc.).

(4) Not approving flights over water when another land route is available, even if the land route

is longer in distance. Over water flights are considered high-risk missions.

d. Aircraft records shall be annotated to show a recurring vibration screening every 25 flight hours per

the procedure specified in paragraph 8. Aircraft are cleared for flight as long as the aircraft passes the

recurring 25-hour inspection. Unit Level Logistics System-Aviation (ULLS-A) users shall use inspection

code 52 for this recurring inspection.

NOTE

Some engines may have been pre-screened for vibrations using a test cell.

Those engines that have vibrations within an acceptable range may be

installed in an airframe, but the "on aircraft" AVA Vibration Test of paragraph

8. must be preformed.

NOTE

Further information/guidance will be provided in a follow-on SOF

Message/TB concerning the long-term solution to the N2 Spur Gear

problem, which will dear all AH-1 aircraft for flight and eliminate the need

for the 25-hour recurring inspection.

10. Supply/Parts and Disposition.

a. Parts Required. N/A

b. Requisitioning Instructions. N/A

c. Bulk and Consumable Materials.

NSN

QTY. COST EACH

TOTAL $

NOMENCLATURE

5310-00-141-1795

2EA

$0.03

S0.06

Washer, Flat

$9.71

1EA

0.213 Drill Bit (#3)

$1.79

1EA

1/4 x 28 UNF Tap

Total Cost Per Aircraft = $17.50

d. Disposition. N/A

e. Disposition of Hazardous Material. N/A