What was found
ON APPROACH, LANDING GEAR DID NOT EXTEND WHEN DOWN SELECTED, ALT GEAR EXT PROCEDURE APPLIED. ACCOMPLISHED TROUBLESHOOTING AS PER AATSM 32-30-00 PAGE 111 FIG 113. REPLACED LANDING GEAR SELECTOR VALVE AND PROX BOX. LEAK CHECKS OK. SEE PIREP 14 FOR OPS CHECK. ALSO ACCOMPLISHED AAMM 32-31-12-6, BITE TEST PROX BOX ALL OK. (M)