Pilot Debrief

PIAGGIO P180 near Clearwater, FL — 2013-04-24

Final reportCEN13IA270
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Date
2013-04-24
Location
Clearwater, FL, USA
Airport
KPIE
Aircraft
PIAGGIO P180
Registration
N139SL
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Landing

Probable cause

The failure of the nose landing gear steering manifold during landing, which resulted in an uncommanded and uncontrollable right turn, and the overhaul facility’s improper overhaul of the nose landing gear steering manifold.

NTSB narrative

During landing, the nosewheel touched down, and the pilot heard the tire "squeal" and then felt the airplane gradually veer right. The pilot attempted to correct the turn by applying left rudder, left braking, and left-engine reverse thrust. The airplane came to a stop with the nose pointed more than 90 degrees right of the runway centerline. Examination of the nose landing gear steering manifold revealed that it had recently been overhauled but that the overhaul was not conducted in accordance with the manufacturer's component maintenance manual (CMM); the overhaul facility used unapproved alternative tooling because it did not have the required tooling to conduct the overhaul as specified in the CMM. The nose landing gear steering manifold exhibited internal damage consistent with metal tooling marks that resulted from the use of improper tooling during the overhaul and led to the failure of the nose landing gear steering manifold during landing.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Proper testing and validation of the nose landing gear overhaul procedures.

NTSB coding

  • Sys/Comp malf/fail (non-power) · Landing-landing roll
  • Maintenance

Evidence available

  • Photos
  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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