AD NUMBER: 2008-16-05
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2008-16-05 SUMMARY: The FAA is
superseding an existing airworthiness directive (AD) for RRD Dart
528, 529, 532, 535, 542, and 552 Series turboprop engines.
That AD currently requires a dimensional inspection of the
intermediate pressure turbine (IPT) disk or an ultrasonic
inspection of the seal arm contact between the high pressure
turbine (HPT) and the IPT disk seal arm and reworking or replacing
the IPT disk if worn beyond acceptable limits.
This AD continues to require those actions. This AD results from
us including an incorrect engine model and omitting an engine model
from the applicability of the existing AD.
We are issuing this AD to prevent HPT disk failure, which can
result in an uncontained engine failure and damage to the