TM 55-1520-240-23-1
1-92
INSPECTION (Continued)
1-92
CALENDAR INSPECTIONS
REF.
NO.
FREQUENCY
INSPECTION REQUIREMENTS
1.
VARIABLE
REFER TO TASK 2-370 FOR INSPECTION INTERVALS BASED UPON
ENVIRONMENTAL AREAS (SEVERE, MODERATE, OR MILD).
2.
DELETED
3.
6 MONTHS
PORTABLE FIRE EXTINGUISHERS FOR WEIGHT. REFER TO TM 11-1500-204-23.
4.
6 MONTHS
AIRCRAFT WITH MWO 55-1520-240-50-39 INSTALLED. INSPECT TWO IDLER ARMS
AND ONE BELLCRANK LOCATED ADJACENT TO THE COMBINER TRANSMISSION
FOR DAMAGE AND DETERIORATION OF ALBI PAINT. REFER TO TASK 11-10.1. IF
MWO 1-1520-240-50-65 (STAINLESS STEEL BELLCRANKS) HAS BEEN APPLIED,
PAINTING OF THE BELLCRANKS WITH ALBI PAINT IS NOT REQUIRED.
5.
12 MONTHS
ENGINE FIRE EXTINGUISHER SYSTEM BOTTLES FOR WEIGHT. VISUALLY
INSPECT FOR GENERAL CONDITION AND PRESSURE CHARGE. SYSTEM
TUBING AND ELECTRICAL CONNECTION FOR CORROSION AND OBVIOUS
DAMAGE. CHECK DA FORM 2408-18 AND THE RETIREMENT SCHEDULE FOR
REPLACEMENT REQUIREMENTS.
6.
12 MONTHS
PERFORM AN INVENTORY CHECK. REFER TO DA FORM 2408-17 AND TASK 1-109.
7.
12 MONTHS
MAGNETIC STANDBY COMPASS FOR CORRECT READING ON ALL CARDINAL
HEADINGS. REFER TO TM 1-1500-204-23.
8.
12 MONTHS
HSI/RMI FOR CORRECT READING ON ALL COORDINATE HEADINGS. REFER TO
TM 1-1500-204-23.
8.1.
24 MONTHS
IF THE AIRCRAFT HAS NOT BEEN THROUGH A PHASE INSPECTION WITHIN
THE LAST 24 MONTH PERIOD, INSPECT THE HORIZONTAL HINGE PINS AND
BEARINGS PER TM 55-1520-240-23-4, TASK 5-40.1.
9.
36 MONTHS
WEIGH THE AIRCRAFT AND PERFORM WEIGHT AND BALANCE RECORDS.
CHECK AT NEAREST PHASE INSPECTION BUT NOT TO EXCEED 36 MONTHS.
REFER TO TM 55-1500-342-23.
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Change 3
