An EMB145 was to be jacked. Lead technician and 3 technicians had difficulty calculating % of mac pe...

Attributes
ACN	661558
Time
Date	200506
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : lead technician
ASRS Report	661558
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	661557
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation non adherence : far non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : work cards contributing factor : manuals contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : training
Supplementary
Problem Areas	Environmental Factor Aircraft Chart Or Publication Company Maintenance Human Performance
Primary Problem	Company

Narrative:

On (date) I was the lead tech at the hangar with 3 mechanics. We were attempting to do a complete jacking of aircraft. We were trying to figure out the formula as detailed in figure 202 of job card X to make sure that the aircraft was within the center of gravity envelope for safe jacking. Supervisor was pressuring me to jack the aircraft without figuring the center of gravity. We spoke with our local inspector who recommended I call station inspections; which I did. Station inspections advised us on how to complete the formula; which we continued to do when supervisor came to the hangar from the terminal. Supervisor did not make any attempt to assist us or to see what problem we were having. He proceeded to give me a negative counseling session on how slow I and my crew were to jack the aircraft. He told me earlier in the day that the aircraft 'only has 3050 pounds of fuel; just jack it.' he told me to skip the step in the job card that included figure 202. To my knowledge; none of my crew has been shown or has received any specific training as to how to calculate the % mac as shown in figure 202.

Original NASA ASRS Text

Title: AN EMB145 WAS TO BE JACKED. LEAD TECHNICIAN AND 3 TECHNICIANS HAD DIFFICULTY CALCULATING % OF MAC PER JOB CARD. MAINT RPTR STATES THAT SUPVR MADE COMMENTS CONCERNING THE SLOWNESS OF WORK BUT DID NOT ASSIST.

Narrative: ON (DATE) I WAS THE LEAD TECH AT THE HANGAR WITH 3 MECHS. WE WERE ATTEMPTING TO DO A COMPLETE JACKING OF ACFT. WE WERE TRYING TO FIGURE OUT THE FORMULA AS DETAILED IN FIGURE 202 OF JOB CARD X TO MAKE SURE THAT THE ACFT WAS WITHIN THE CTR OF GRAVITY ENVELOPE FOR SAFE JACKING. SUPVR WAS PRESSURING ME TO JACK THE ACFT WITHOUT FIGURING THE CTR OF GRAVITY. WE SPOKE WITH OUR LCL INSPECTOR WHO RECOMMENDED I CALL STATION INSPECTIONS; WHICH I DID. STATION INSPECTIONS ADVISED US ON HOW TO COMPLETE THE FORMULA; WHICH WE CONTINUED TO DO WHEN SUPVR CAME TO THE HANGAR FROM THE TERMINAL. SUPVR DID NOT MAKE ANY ATTEMPT TO ASSIST US OR TO SEE WHAT PROB WE WERE HAVING. HE PROCEEDED TO GIVE ME A NEGATIVE COUNSELING SESSION ON HOW SLOW I AND MY CREW WERE TO JACK THE ACFT. HE TOLD ME EARLIER IN THE DAY THAT THE ACFT 'ONLY HAS 3050 LBS OF FUEL; JUST JACK IT.' HE TOLD ME TO SKIP THE STEP IN THE JOB CARD THAT INCLUDED FIGURE 202. TO MY KNOWLEDGE; NONE OF MY CREW HAS BEEN SHOWN OR HAS RECEIVED ANY SPECIFIC TRAINING AS TO HOW TO CALCULATE THE % MAC AS SHOWN IN FIGURE 202.

Data retrieved from NASA's ASRS site as of January 2009 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.

An EMB145 was to be jacked. Lead technician and 3 technicians had difficulty calculating % of mac per job card. Maintenance reporter states that supervisor made comments concerning the slowness of work but did not assist.