Md-11 captain reported the parking brake did not engage at the gate which allowed the aircraft to ro...

Narrative:

After parking at the self-park gate I set the parking brake and shut down engines 1 and 3 then waited for the ground power to be connected. Evidently the parking brake did not set as I noticed we were slowly rolling forward. I applied the brakes to stop the aircraft and checked the parking brake. It was not set. I reset the parking brake and noticed it did not set again this time either. I pulled a little harder and the parking brake set. I spoke to the marshallers and coordinated for a tug to push us back the two feet we had rolled forward. No contact with anything was made; no damage occurred and no one was injured.I usually try to be aware and ensure the parking brake actually sets when applied. I am not sure why I missed it today but I did. I felt the parking brake go into position but I did not ensure that it stayed there.I think my new technique will be to watch the parking brake for a second or two to ensure it actually engages. I just went by feel this time and while I felt it in position it obviously did not hold and slipped off.

Original NASA ASRS Text

Title: MD-11 Captain reported the parking brake did not engage at the gate which allowed the aircraft to roll several feet before movement was detected. Two additional attempts finally locked the brake in position.

Narrative: After parking at the self-park gate I set the parking brake and shut down engines 1 and 3 then waited for the ground power to be connected. Evidently the parking brake did not set as I noticed we were slowly rolling forward. I applied the brakes to stop the aircraft and checked the parking brake. It was not set. I reset the parking brake and noticed it did not set again this time either. I pulled a little harder and the parking brake set. I spoke to the marshallers and coordinated for a tug to push us back the two feet we had rolled forward. No contact with anything was made; no damage occurred and no one was injured.I usually try to be aware and ensure the parking brake actually sets when applied. I am not sure why I missed it today but I did. I felt the parking brake go into position but I did not ensure that it stayed there.I think my new technique will be to watch the parking brake for a second or two to ensure it actually engages. I just went by feel this time and while I felt it in position it obviously did not hold and slipped off.

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.

Attributes
ACN	1410833
Time
Date	201612
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Brake System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Md-11 captain reported the parking brake did not engage at the gate which allowed the aircraft to roll several feet before movement was detected. Two additional attempts finally locked the brake in position.