2016-S19 Shortening the end play check interval for the nose landing gear actuator screw<br /><br />assembly

Investigation branch:

Aviation L

Recommendation ID:

2016-S19

Issue date:

3.10.2016

End implementer of the recommendation:

Federal Aviation Administration (FAA)

Implementation status:

Not to be implemented

Investigation:

L2015-02 Nose landing gear malfunction in aircraft OH-BEX at Helsinki-Vantaa airport on 26 August 2015

Type of accident:

Business aviation

Justification of the recommendation

Due to the landing gear operating principle, the screw assembly forms a critical weakest link in the system. Sufficient lubrication and wear rate are affected by several factors, in relation to which the end play check interval is too long. Moreover, end play measurement requires particular care.

Recommendation

Federal Aviation Administration (FAA) of the United States require the aircraft manufacturer to review the maintenance requirement so that the end play check interval is significantly shortened and the thread wear rate is taken into account.

Specification of recommendation

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Reiterated in investigation: ---

Actions / explanations

The recommendation is under review (FAA MKG AEG).

Updated 14.5.2020