What was found
LANDING GEAR RETRACTION SYSTEM ON FINAL APPROACH AT APPROX. 170 KTS AND 1600 AGL GEAR EXTENSION ATTEMPT RESULTED IN RED GEAR DISAGREE MSG. AS PER QRH,CYCLED GEAR 3 TIMES WITH NO SUCCESS, RESORTED TO MANUAL EXTENSION RESULTING IN 3 DOWN AND LOCKED INDICATIONS. DEFERRED GEAR RETRACTION SYSTEM. TROUBLESHOT - FOUND NUMEROUS PESU FAULTS. RE-RACKED PESU. OPS CHECK NORMAL. IAW CRJ 900 AMM. PREFORMED NUMEROUS GEAR SWINGS OPS CHECK NORMAL IAW CRJ 900AMM THIS CLEARS MEL