AD 2006-19-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada | Airworthiness Directives; Pratt & Whitney Canada Turboprop Engines |
Unsafe Condition
Through-cracks in the No. 19 bearing area of the propeller shaft, caused by hydrogen embrittlement from an improper nickel-plating repair process, could result in uncontained engine failure and damage to the airplane.
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Required Actions
Before further flight, replace any propeller shaft with a serial number listed in Tables 1, 2, or 3 of P&WC Service Bulletin PW100-72-21714, Revision 2. Within two days after the effective date, perform an initial visual inspection on propeller shafts listed in Table 4. Perform repetitive visual inspections at intervals not exceeding 7 days. Within 250 hours time-in-service or three months after the effective date, perform a fluorescent penetrant inspection on propeller shafts listed in Table 4. Remove any propeller shaft listed in Table 4 before December 31, 2007.
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Compliance Time
Before further flight for replacements; within two days for initial inspection; at intervals not exceeding 7 days for repetitive inspections; within 250 hours or three months for penetrant inspection; before December 31, 2007 for removal.
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Affected Aircraft
Pratt & Whitney Canada Models PW118, PW118A, PW118B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW124B, PW125B, PW127, and PW127E turboprop engines with certain propeller shafts installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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