Background
Background Background
The Warbirds Maintenance Review Board has received a report of a T-28 aircraft with cracks in the tailplane ribs and forward tailplane attachment fitting. The Board has recommended issue of a Directive to inspect unmodified tailplanes on Australian registered T-28 aircraft for similar cracks.
The T-28 aircraft has a history of horizontal tailplane failures. Investigation of the failures by the manufacturer has shown that the design standard in use at the time may not meet applied service loads. The manufacturer has recommended that all tailplanes are strengthened to meet a later design standard. When details of the modification are received this Directive may be amended accordingly. It has been reported that the aircraft found with cracks had not been modified.
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