What was found
(CAN) TWO REPORTED DEFECT FOR NLG FAILING TO RETRACT ON THE SAME ACFT ON OCT 21 AND OCT 24, 2014. THE NOSE GEAR WAS REPLACED 14TH SEPT DUE TIME X REQUIREMENTS, THE INSTALLATION HAD COMPLETED 52 CYCLES BEFORE FIRST FAILURE AND THIS WAS TAKEN INTO CONSIDERATION DURING THE FAULT FINDING BY COMPLETING A THOROUGH REVIEW OF THE INSTALLATION, AS MENTION NOTHING PHYSICAL COULD BE FOUND. THE NOSE LEG COMPLETED 8 TAKE-OFFS BETWEEN THE 2 FAILURES. THE FOLLOWING MAINTENANCE ACTION WAS UNDERTAKEN ON THE 1ST INSTANCE MULTIPLE RETRACTIONS C/OUT UNABLE TO REPRODUCE DEFECT, INSPECTIONS OF INTERROGATED PSEU, NO CURRENT FAULTS. CHECKED PROXIMITY SENSOR GAPS AT NOSEGEAR LK 1 & 2 WITHIN TOLERANCE IAW AMM 32-61-06. INSPECTED NOSE BAY CONNECTORS, FOUND P37, NOSE DCL, LOOSE. CLEANED, INSPECTED & RECONNECTED. CUTOUT RESISTANCE CHECK OF NLG DOORS SOLENOID SEQUENCING VALVE, WITHIN SPEC IAW AMM 32-31-71. GEAR COMPONENTS & SEQUENCE VALVE FILTERS REPLACED IAW MM-32-31-71. THE FOLLOWING MAINTENANCE ACTIONS WHERE UNDERTAKEN ON THE SECOND EVENT SOLENOID SEQUENCE VALVE REPLACED IAW MM 32-31-71, CARRIED OUT OPS CHECK, NO DEFECTS EVIDENT. IN LINE FILTER ON NLG SOLENOID SEQUENCE VALVE REPLACED IAW AMM 32-31-71. NLG STEERING RVDT`S FOUND OUTSIDE AMM LIMITS. REPLACED SPUR GEAR IAW MM 32-51-36. RERIGGED RVDT`S IAW MM 32-51-00. CARRIED OUT FUNCTIONAL TEST OF NLG STEERING SYS IAW MM 32-51-00: NO DEFECTS EVIDENT. NLG MECHANICAL SEQUENCE VALVE REPLACED WITH SERVICABLE ITEM IAW AMM 32-31-66. POST PART REP & LEAK CHECKS & BLEED. C/O 30X GEAR RETRACTIONS & EXTENSIONS & 1 X ALT EXTENSION. UNABLE TO FAULT SYSTEM, CONSIDERED SERVICABLE AT THIS TIME. REPLACED PSEU, OPS CHECKED C/O AND FOUND SERVICEABLE IAW AMM 32-61, MAINTNENANCE WAS UNABLE TO IDENTIFY A SPECIFIC COMPONENT THAT CAUSE THIS DEFECT.