CFM56-7 HMU Overall Reliability

航空

游客，如果您要查看本帖隐藏内容请回复

航空

February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1
HMU Program
CFM56-7 HMU Overall Reliability
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2
HMU Program
CFM56-7 P07 HMU Removals / MTBUR
0
5
10
15
20
25
30
35
40
45
50
Jan-01
Feb-01
Mar-01
Apr-01
May-01
Jun-01
Jul-01
Aug-01
Sep-01
Oct-01
Nov-01
Dec-01
Removals
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
MTBUR
HMU Removals
6-Month MTBUR
12-Month MTBUR
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3
HMU Program
Removal Cause Last 12 Mo.
116
95
46
43 42 40
33
16 16
9 8
0
20
40
60
80
100
120
140
Chafing / Wrap Fault
FMV F/B
HPSOV Switch
Unknown / Misc
Engine Control Light
DMD/FDBK
BSV
Leak
Precautionary
No Start
No Shutdown
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4
HMU Program
HMU reliability remains flat
• Current 12 Month MTBUR is 12,000 Hr’s
• Average removals, 32 per month over the last year
Corrective Actions for top removal causes
• Chaffing/Wrap Fault is leading cause for removal
• Wire bracket Intro production 5/01, SB issued 9/14
• HPSOV Switch Latching on Starts
• CFMI service bulletin 73-067 issued for new switch
Investigations - Refer to separate presentations
• FMV Feedback Fault
• Boeing/CFMI/Honeywell & Kearfott Team established
• Weekly call, and face to face meetings as needed
• MSV / BSV position faults
• On-going investigation focusing on MSV/BSV solenoid pull-in
current

979199501

Arm Proposed Switch Configuration Current Double Throw Proposed Single Throw Run contact eliminated Introduction Logistics • CFMI/Boeing/Honeywell laun

kinran

bocome

CFM56-7 HMU Overall Reliability