Two air carrier maintenance technicians reported that during a heavy check on an airbus 319 it was d...

Narrative:

Three lower engine mount pins found missing from sleeves on aft mount during heavy maintenance visit.during engine build up to bring engine up to qec [quick engine change] status prior to engine installation. The aft engine mount was installed on the engine. This entails putting the mount in place and inserting sleeves through the engine case and the bearings on the mount. Pins are then inserted in the sleeves and secured with metal straps on both sides of the pins. Bolts are then torqued to secure the straps in place. The mount installation was done months ago. I cannot recall this specific occurrence with certainty since it's a fairly common procedure here. These pins are fairly large. Even if the step of installing the pins was overlooked; the left over parts should have been obvious. Possible contributing factors: there were a lot of distractions in the hangar that month since it was new at the time with construction finishing touches going on; with a lot of activity moving in equipment and setting it up.perhaps an added step to verify pins are installed at the end of mount installation would prevent a recurrence.

Original NASA ASRS Text

Title: Two air carrier Maintenance Technicians reported that during a heavy check on an Airbus 319 it was discovered that lower engine mount pins were missing.

Narrative: Three lower engine mount pins found missing from sleeves on aft mount during heavy maintenance visit.During engine build up to bring engine up to QEC [Quick Engine Change] status prior to engine installation. The aft engine mount was installed on the engine. This entails putting the mount in place and inserting sleeves through the engine case and the bearings on the mount. Pins are then inserted in the sleeves and secured with metal straps on both sides of the pins. Bolts are then torqued to secure the straps in place. The mount installation was done months ago. I cannot recall this specific occurrence with certainty since it's a fairly common procedure here. These pins are fairly large. Even if the step of installing the pins was overlooked; the left over parts should have been obvious. Possible contributing factors: there were a lot of distractions in the hangar that month since it was new at the time with construction finishing touches going on; with a lot of activity moving in equipment and setting it up.Perhaps an added step to verify pins are installed at the end of mount installation would prevent a recurrence.

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	1481875
Time
Date	201704
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Powerplant Mounting
Person 1
Function	Inspector
Qualification	Maintenance Powerplant Maintenance Airframe Maintenance Inspection Authority
Experience	Maintenance Inspector 16 Maintenance Technician 5
Person 2
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Experience	Maintenance Technician 13
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Two air carrier maintenance technicians reported that during a heavy check on an airbus 319 it was discovered that lower engine mount pins were missing.