Patent ID: 9551295
Date: 2017-01-24
CPC Classifications: F02K

Claim:
1. A skew sensing apparatus for an aircraft engine variable area fan nozzle (VAFN) assembly, the apparatus comprising: an arcuate VAFN section; a translatable sleeve of a thrust reverser assembly that is moved between a stowed position and a deployed position, the arcuate VAFN section supported by the translatable sleeve and translatable with respect to the translatable sleeve: a first rod attached to a first portion of the VAFN section spanning along the translatable sleeve in a longitudinal direction, the first rod having a first pattern along a length of the first rod; a second rod attached to a second portion of the VAFN section and spanning along the translatable sleeve in the longitudinal direction, the second rod having a second pattern along a length of the second rod; a first sensor adapted to sense a position of the first rod using the first pattern; a second sensor adapted to sense a position of the second rod using the second pattern; and a circuit comparing the position of the first rod and the position of the second rod from the first sensor and the second sensor respectively and taking a corrective action when the skew is determined between the first rod and the second rod.