72-30-06
November 2011
NOTE... In some instances, the VAR identification may have been ground
off in the balancing process and cannot be verified. If the VAR indication
cannot be verified, replace the crankshaft.
Figure 72-30-1. Crankshaft Ultrasonic Inspection Method Location
72-30-05
FLUORESCENT PENETRANT INSPECTION
Perform this inspection on all cleaned, aluminum or non-ferrous metal parts, including the parts
listed below in accordance with ASTM E1417, E1208, E1209, E1219, and Type 1 Fluorescent
Penetrant Method A, B, C, or D.
Table 72-30-3. Crankshaft Ultrasonic Inspection Pass/Fail Action
Crankshaft Meets Inspection Criteria
Crankshaft Fails Inspection Criteria
Vibroetch the crankshaft flange as illustrated in
Figure 72-30-1 with either a “V” (vacuum arc
remelted (VAR) verified) or “U” (ultrasonic
inspection) to identify the inspection method:
- Remove the crankshaft from service.
- Mutilate the crankshaft to identify it as
“Unairworthy.”
- Replace the crankshaft with a new one.
V/U
VAR Steel/Ultrasonic Inspected
(Figure 72-30-1) EXAMPLE 1
U
Non-VAR Steel/Ultrasonic Inspected
(Figure 72-30-1) EXAMPLE 2
Table 15-31. Parts requiring Fluorescent Penetrant Inspection
Inspect:
Pay particular attention to:
• Accessory Drive Adapters
• Brackets
• Crankcase halves
• Cylinder heads
• Engine mounts
• Induction manifolds
• Induction risers
• Induction tubes
• Oil pump housings
• Oil sumps (non-ferrous)
• Starter adapter housings
• Areas where oil seals or bushings
are pressed in or seated
• Area surrounding valve seat
inserts
• Area surrounding valve guides
• Areas surrounding through-bolt
holes
• Bearing bosses
• Between cylinder head cooling
fins
• Crankcase/crankshaft exit area
• Cylinder-to-barrel mating area
• Intake and exhaust flanges
• Intake and exhaust ports
• Mounting and attaching areas where
hardware has been previously torqued
• Oil pump cavity area mounting flanges
• Rocker boss areas
• Shaft bores
V/U
EXAMPLE 1
U
EXAMPLE 2
V/U
EXAMPLE 1
V/U
EXAMPLE 1
U
EXAMPLE 2
U
EXAMPLE 2
Summary of Contents for LTSIO-520-AE
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