Cessna citation excel flight crew reported evidence of a brake system leak during the preflight insp...

Attributes
ACN	1515556
Time
Date	201802
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Citation Excel (C560XL)
Operating Under FAR Part	Part 135
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Brake System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

We were assigned to fly aircraft X for our duty day. The aircraft was one we had not yet flown this tour. A previous crew had written the airplane up for a brake fluid leak on the right main landing gear. Upon preflight inspection I noted that the brake assembly was dry of fluid and in reviewing the log book I noted that a mechanic had signed the write up off as being repaired. After starting the APU and setting the brake in preparation for departure we noticed that there was a puddle of brake fluid below the right main landing gear brake assembly and the brake assembly was wet with brake fluid when we did our pre-departure walk around. I am seeing more and more write ups that are signed off as being fixed only to have the same failure occur again either immediately or within a very few cycles. Better quality control and or/better maintenance vendors need to be employed.

Original NASA ASRS Text

Title: Cessna Citation Excel flight crew reported evidence of a brake system leak during the preflight inspection even though the issue had been previously documented and reported as corrected by maintenance personnel.

Narrative: We were assigned to fly Aircraft X for our duty day. The aircraft was one we had not yet flown this tour. A previous crew had written the airplane up for a brake fluid leak on the right main landing gear. Upon preflight inspection I noted that the brake assembly was dry of fluid and in reviewing the log book I noted that a mechanic had signed the write up off as being repaired. After starting the APU and setting the brake in preparation for departure we noticed that there was a puddle of brake fluid below the right main landing gear brake assembly and the brake assembly was wet with brake fluid when we did our pre-departure walk around. I am seeing more and more write ups that are signed off as being fixed only to have the same failure occur again either immediately or within a very few cycles. Better quality control and or/better maintenance vendors need to be employed.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Cessna citation excel flight crew reported evidence of a brake system leak during the preflight inspection even though the issue had been previously documented and reported as corrected by maintenance personnel.