CFM Electrical Harnesses

航空发表于 2011-4-15 19:23:11

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航空发表于 2011-4-15 19:23:27

February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1 Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 2 Background • Harness outer metallic braid found damaged at clamp location Investigation • Chafing occurred at clamp locations. • Clamp cushion wear due to vibration and allow harness braid to contact / wear against clamp • Issue identified at 6 different clamp locations in core compartment  Most of the time when two branches are in the same clamp Corrective Action • New clamps design validated (P/N 649-411-981/990-0)  Includes an additional cushion in between the clamp and the harness  S/B 72-0285 targeted for Mar 2002 Electrical Harnesses CJ9 / CJ10 Chafing Issue February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3 Repairs • On-wing temporary repair  Valid up to harness shop visit  Communicated to airlines through Jan 2001 fleet highlight • 2 improved on-wing repairs to be introduced in AMM:  1) Wrapping of the wear external braid with fiberglass insulting tape + adjunction of a thermal protective metal wire wrapped around the repaired area – To be released in AMM Feb 2002 rev.  2) Adjunction of two half cylindrical shelves secured by the clamps themselves – To be released in AMM Jun 2002 rev. • Shop repair developed  Metallic outer braid or complete branch replacement – CMM to be updated Electrical Harnesses CJ9 / CJ10 Chafing Issue February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4 Background • Numerous cases of TCC and T3 intermittent faults in-service • 60% sensors returned are not confirmed at vendor • Investigation showed oxidation/pollution on connectors pins side which could explain the intermittent faults Investigation • Deeper analysis shows  Contaminant on pins identified as Si and Al oxides  Pollution from high temperature sheath found on the connector sockets  Flaking sheath found in backshells  Sheath contain Si and Al oxides TCC (DAC) / T3 Connector Reliability Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5 Pollution entries Deposit of flake of sheath High Temp. Sheath TCC (DAC) / T3 Connector Reliability Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 6 Corrective Action • Addition of Viton A heat shrinkable sleeve on the sheath  Go-ahead decision 1Q 2002  Prod. intro 3Q 2002 TCC (DAC) / T3 Connector Reliability Also • Hermetic connector design under evaluation Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 7 Background • Due to HPTACC thermocouple deletion on the SAC engines, the production harnesses will be modified and the TCC branch will be deleted from the CJ9 harness. • Engines with 7BM1 software can either be fitted with  Old harness with TCC sensor OR  Old harness with parking bracket OR  New harness with plugged TCC orifice Action Plan • New harness design available. • New harness supporting Brackets design in process • Implementation in production targeted for 3Q 2002 TCC Branch Deletion Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 8 Background • Wires chafing inside the 90° backshell of DP1102 connector (customer bleed) • SB 72-0262 issued 26 Jul 2000  Introduces new improved harness design (P/N 325-029-905-0)  Provides old configuration (P/N 325-029-901/902-0) rework instructions • One case of chafing recently reported on other terminal Actions Plan • SB to be revised to extend rework capability the others backshells if needed  Design review in process to verify need/effectiveness vs connectors MW0311 Harness Chafing Electrical Harnesses February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 9 Background • Component Maintenance Manuals concerning electrical harnesses have to be updated • Through WTT Telecon Customers put priority on:  CMM 26-11-02 = Fire Detection Harnesses MW325, MW326  CMM 73-24-03 = Engine Harnesses J5, J6, J7, and J8 • Current plan  CMM 26-11-02 Feb 2002  CMM 73-24-03 Apr 2002 • Overall activity plan targeted Feb 2002 CMM For Harnesses Electrical Harnesses

979199501 发表于 2011-4-15 23:56:25

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

kinran 发表于 2011-6-4 23:19:51

:victory: :victory:

bocome 发表于 2011-7-31 04:50:25

CFM Electrical Harnesses

lazybone9988 发表于 2011-12-15 08:48:50

好的资料！好的资料！

醉酒的西门 发表于 2012-4-20 08:18:16

谢谢楼主最近急需这些资料:)

linairm 发表于 2012-4-20 16:36:24

好东西，谢谢楼主

kwan2008 发表于 2013-10-9 12:45:10

看看。。。。。。。。。。。。。。。。。。。。。。。

jiangyuan1011 发表于 2014-6-17 20:51:43

回复才能看，实在不够意思

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CFM Electrical Harnesses

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