A B747-400 was grounded after landing because maintenance determined that the maintenance action to ...

Attributes
ACN	957874
Time
Date	201107
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	Parked
Route In Use	None
Flight Plan	IFR
Component
Aircraft Component	Pneumatic Valve/Bleed Valve
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 14500 Flight Crew Type 60
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy Deviation - Procedural MEL

Narrative:

Prior to our preflight at our originating station we reviewed that the aircraft log book had a current airworthiness signature for our date of flight and departure. We also noticed that the flight release paper work had an MEL 36-21-3 for the #2 engine bleed pressure sensor which was also reflected in the log book. Upon referencing the MEL we noticed that operations procedures were none and we agreed that the proper placard for this MEL was located approximately 2 inches to the left of the hydraulic pressure gauge and slightly below the captain's primary flight display. 36-21-3 engine bleed pressure sensor. Remarks and exceptions may be inoperative. Operations procedures none. Operational limitations none. Placard placard below captain's pfd on P-1-1 panel: '_____ engine bleed press sensor inoperative.' enter item in aircraft deferred item log. Maintenance procedures none. Immediately after engine shutdown maintenance personnel advised us that our aircraft was grounded (aog) due to an improper repair of MEL 36-21-3. Prior to flight we followed the proper procedures for determining airworthiness of our aircraft and were under the impression throughout the entire flight that we had an airworthy aircraft. Flight continuation was canceled.

Original NASA ASRS Text

Title: A B747-400 was grounded after landing because Maintenance determined that the maintenance action to comply with MEL 36-21-3 was not properly performed prior to the flight.

Narrative: Prior to our preflight at our originating station we reviewed that the aircraft log book had a current airworthiness signature for our date of flight and departure. We also noticed that the Flight Release paper work had an MEL 36-21-3 for the #2 Engine Bleed Pressure Sensor which was also reflected in the log book. Upon referencing the MEL we noticed that Operations Procedures were NONE and we agreed that the proper placard for this MEL was located approximately 2 inches to the left of the Hydraulic Pressure Gauge and slightly below the Captain's Primary Flight Display. 36-21-3 ENGINE BLEED PRESSURE SENSOR. REMARKS AND EXCEPTIONS May be inoperative. OPERATIONS PROCEDURES NONE. OPERATIONAL LIMITATIONS NONE. PLACARD Placard below Captain's PFD on P-1-1 panel: '_____ ENG BLEED PRESS SENSOR INOP.' Enter item in Aircraft Deferred Item Log. MAINTENANCE PROCEDURES NONE. Immediately after engine shutdown Maintenance personnel advised us that our aircraft was grounded (AOG) due to an improper repair of MEL 36-21-3. Prior to flight we followed the proper procedures for determining airworthiness of our aircraft and were under the impression throughout the entire flight that we had an airworthy aircraft. Flight continuation was canceled.

Data retrieved from NASA's ASRS site as of April 2012 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.

A B747-400 was grounded after landing because maintenance determined that the maintenance action to comply with MEL 36-21-3 was not properly performed prior to the flight.