TB 1-1520-251-20-01
f. Paragraph 9.18.1. of the Longbow Operator 's Manual will be changed as follows (the following
procedures are underlined):
9.18.1. Both Generator 's Fail/Complete Loss of Electrical Power.
1. Exit NOE environment.
2. GEN 1 and GEN 2 -- Reset pilot GEN RST panel.
If condition persists:
3. LAND AS SOON POSSIBLE .
9.18.1.a. Single Generator/Single RTRU Failure.
1. Exit NOE environment.
2. Affected GEN 1 or GEN 2 -- Reset pilot GEN RST panel.
If condition persists:
3. LAND AS SOON AS PRACTICABLE .
9.18.1.b. Multiple MPD Failure.
1. Exit NOE environment.
2. LAND AS SOON AS POSSIBLE .
g. The following urgent action changes will be made to TM 1-1520-251-CL, page E11/(E12 blank):
Under the topic, "Electrical System Malfunction," replace subparagraph, "Both generator fail (GEN 1 Fail and
GEN 2 FAIL)" with the following (the following procedures are underlined):
BOTH GENERATORS FAIL/COMPLETE LOSS OF ELECTRICAL POWER
1. Exit NOE environment.
2. GEN 1 and GEN 2 -- Reset pilot GEN RST panel.
If condition persists:
3. LAND AS SOON AS POSSIBLE .
SINGLE GENERATOR/SINGLE RTRU FAILURE
1. Exit NOE environment.
2. Affected GEN 1 or GEN 2 -- Reset pilot GEN RST panel.
If condition persists:
3. LAND AS SOON AS PRACTICABLE .
MULTIPLE MPD FAILURE
1. Exit NOE environment.
2. LAND AS SOON AS POSSIBLE .
h. The following urgent action changes will be made to TM 1-1520-251-MTF, page 2--2, under topic,
"Prior to Maintenance Test Flight" (the following procedures are underlined):
BOTH GENERATORS FAIL/COMPLETE LOSS OF ELECTRICAL POWER
1. Exit NOE environment.
2. GEN 1 and GEN 2 -- Reset pilot GEN RST panel.
If condition persists:
3. LAND AS SOON AS POSSIBLE .
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