Fuel Filter Reliability Summary 737-900ER (Jul'10)

8/7/2019 Fuel Filter Reliability Summary 737-900ER (Jul'10)

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Fuel Filter Reliability Summary

Component Name : Fuel Filter B737-900 ER

Part Number : ACC462F2038M

Manufacture : Pall - Aircraft Media Europe Ltd.

Source Data : PIREPS and JobCard B737-900ER period 2007 present, to find the hours life of each fuel filter

Removal Period : All B737-900 ER fuel filter replacement fleets areused to calculate the life hours of each fuel filter

Number of Removal : 206 times since the first 737-900ER come to Lion Air

Purpose : Review&Suggest new interval of fuel filter for 2010

1.Table Data

Eng Pos-1 Eng Pos-2

A/C RegJobCar

dTSI

PIREPS -TTF

A/C RegJobCard

(TSI)

PIREPS -TTF

PK-LFF 1,414

2,40

6 PK-LFF 3,794

1,18

6

10-Jan-082,80

727-Dec-

08 6,391

12-Sep-082,49

923-Mar-

0981

1

25-Mar-091,91

3 28-Jul-09 1,196

13-Aug-09 1,329 20-Jan-101,56

0

2-Feb-10 1,515 PK-LFG 8701,44

4

6-Jul-10 1,399 25-Jan-08

2,57

5

PK-LFG 1,0061,51

512-Aug-

082,08

0

25-Jan-08 2,57524-Dec-

08 1,405

6-Sep-082,32

8 15-Jan-0921

7

10-Oct-08 337 18-Apr-0987

7

23-Dec-08 810 31-Jul-09 982


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6-Mar-0970

6 8-Jan-101,47

1

2-Aug-091,39

7 1-Feb-10 222

8-Sep-09 302 PK-LFH 1,947

2,79

6

1-Mar-101,63

016-Aug-

084,56

9

PK-LFH 1,9521,79

227-Feb-

09 1,947

28-Feb-082,80

6 18-Jun-091,02

3

11-Sep-08 2,014 PK-LFI 1,3131,74

8

20-Mar-09 1,889 7-Apr-08 2,809

7-Oct-091,82

419-Sep-

081,64

6

24-Dec-0974

611-Mar-

091,67

0

PK-LFI 1,2881,77

0 8-Jun-09 847

7-Apr-08 2,809 7-Jan-101,92

9

8-Oct-081,81

1 9-Feb-10 283

25-Mar-091,63

3 PK-LFJ 2,0161,29

8

6-Jun-09 698 2-Jul-08 3,132

29-Dec-09 1,866 24-Dec-08 1,748

8-Feb-10 35717-Mar-

0977

2

PK-LFJ 1,9301,11

2 22-Jul-09 1,167

2-Jul-08 3,132 27-Jan-101,72

6

23-Dec-08 1,739 2-Jul-101,39

6

4-Apr-0994

7 PK-LFK 9623,53

2

14-Aug-09 1,22626-Mar-

093,53

2

10-Feb-10 1,621 14-Apr-09 191

2-Jul-101,27

7 1-Feb-10 1,732

PK-LFK19

72,12

7 PK-LFL 1,3211,51

4

14-Apr-093,72

3 8-Aug-082,32

413-May- 30 7-Jan-09 1,522


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09 1

13-Jan-102,35

6 9-Apr-0988

5

2-Feb-10 197 1-Oct-091,62

5

PK-LFL85

21,44

8 1-Feb-10 1,120

25-Aug-082,51

2 18-Jun-101,22

0

7-Sep-0813

0 PK-LFM 2,0532,48

1

14-Mar-091,82

817-Dec-

083,53

9

28-Jul-09 1,319 3-May-091,42

2

1-Oct-09 567 3-Jan-10 2,409

13-Dec-09 671 1-Jul-10 1,697

8-May-101,32

0 PK-LFO 1,0652,11

1

PK-LFM 1,8851,06

5 28-Oct-082,83

5

5-Jan-09 3,735 3-Jan-09 729

3-May-091,22

621-May-

091,38

6

3-Jul-0960

1 24-Jul-09 621

6-Feb-102,09

5 1-Feb-10 1,844

10-Feb-10 34 PK-LFP 4,9851,74

8

18-Mar-1033

8 29-Apr-09 4,985

PK-LFO 1,1661,94

5 2-Nov-091,74

8

17-Apr-094,58

6 PK-LFQ 1,4881,16

526-May-

09 40424-Dec-

08 1,596

10-Dec-09 1,927 19-Apr-091,16

5

2-Jan-1022

3 22-Jul-09 944

16-Apr-101,02

6 3-Feb-10 1,925

PK-LFP 1,4064,50

8 PK-LFR 1,3111,50

4

9-Mar-094,50

824-Dec-

08 1,345

30-Apr-09 48627-May-

091,50

4


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10-Dec-09 2,09012-Aug-

09 782

10-Jun-10 1,64211-Feb-

10 1,805

PK-LFQ 1,336

1,62

2 PK-LFS 1,545

2,54

3

23-Dec-08 1,58431-Mar-

09 1,028

5-Jun-091,62

211-Dec-

092,54

3

22-Jul-09 499 6-Jul-10 2,062

3-Feb-10 1,925 PK-LFT 6211,90

3

PK-LFR 1,8141,79

231-Mar-

09 526

23-Dec-08 1,333 10-Jun-09 715

24-Jun-091,79

2 3-Nov-091,42

0

9-Feb-10 2,294 6-Jul-102,38

5

PK-LFS 1,0372,28

0 PK-LFU 2,8111,65

3

1-Apr-09 1,03730-Dec-

09 2,811

25-Dec-092,67

8 9-Jun-101,65

3

2-Jul-101,88

1 PK-LFV 2,8461,70

3

PK-LFT 982 1,550 30-Dec-09 2,846

31-Mar-09 526 19-Jun-101,70

3

10-Jun-0971

5 PK-LFW 2,777

5-Nov-09 1,438 3-Feb-10 2,777

8-Jul-102,38

5 PK-LFY 2,6151,72

4

PK-LFU 2,640 1-Feb-10 2,615

13-Dec-09 2,640 20-Jul-101,72

4

PK-LFV 2,6652,10

2 PK-LFZ 2,7231,37

5

13-Dec-09 2,66518-Feb-

10 2,723

11-Jul-102,10

2 4-Jul-101,37

5

PK-LFW 2,4421,91

9 PK-LGF 4131,12

2

31-Dec-09 2,442 1-Jan-09 143


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4-Jul-101,91

9 7-Apr-0951

6

PK-LFY 2,6251,69

7 24-Jul-09 1,022

2-Feb-10 2,625 24-Jan-10

1,72

7

18-Jul-101,69

7 1-Feb-10 74

PK-LFZ 2,6881,49

3 PK-LGG 9591,18

7

15-Feb-10 2,68824-Dec-

08 127

13-Jul-101,49

3 8-Apr-091,00

4

PK-LGF86

61,31

1 27-Jul-09 1,030

1-Jan-09 143 5-Feb-10 1,721

21-May-09

1,311 7-Jul-10

1,369

21-Jul-09 587 PK-LGH 8811,31

8

5-Feb-10 1,86821-Dec-

08 33

PK-LGG90

81,29

5 24-Apr-091,16

5

23-Dec-08 115 26-Jul-09 859

21-Apr-091,14

210-Feb-

10 1,750

26-Jul-09 893 21-Jul-10 1,470

3-Feb-10 1,717 PK-LGI 6541,12

9

14-Jul-101,44

829-Dec-

08 98

PK-LGH87

71,17

615-Aug-

09 1,209

22-Dec-08 42 21-Oct-0956

7

26-Apr-091,17

6 24-Apr-101,69

1

25-Jul-09 831 PK-LGJ 2,62910-Feb-10 1,758 6-Mar-10 2,629

PK-LGI92

81,25

3 PK-LGK 2,212

28-Dec-08 8818-Mar-

10 2,212

22-Apr-091,10

7 PK-LGL 2,033

24-Aug-09 1,16328-Mar-

10 2,033


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12-Feb-10 1,532 PK-LGM 1,431

15-Jul-101,39

825-May-

10 1,431

PK-LGJ 2,619 PK-LGP 1,482

5-Mar-10 2,619

29-May-

10 1,482PK-LGK 2,073 PK-LGQ 1,444

4-Mar-10 2,07331-May-

10 1,444

PK-LGL 2,053 PK-LGR 1,414

30-Mar-10 2,053 26-Jun-10 1,414

PK-LGM 1,42224-May-

10 1,422

PK-LGP 1,47328-May-

10 1,473PK-LGQ 1,453

1-Jun-10 1,453

PK-LGR 1,414

26-Jun-10 1,414

History :2007 Nov 2008 : The interval of Fuel Filter followed what stated in MPD 6,000

HoursDec08 Mar10 : The interval of Fuel Filter was decreased until 2,000 HoursApr10 present :The interval of Fuel Filter was decreased until 1,500 Hours

2.Pareto Diagram


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By seeing above simple pareto, its seen that Overlap Replacement that couldaffect Fuel Filter to be clogged and suddenly clogging in the air should becomeour concern to be decreased.

3.Histogram


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Above histogram graph told us that this fuel filter not fully in middle or averagetime to failure, the time to failure is lower than the average number

4.Fish Bone Diagram


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5. Graph AnalyzeOverlap means that over due from due date of schedule of replacement


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Below 2 graph show percentage after Interval Replacement was decreased until

2000 FH, seen that from 60% Clogging problem become 33%


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Last graph told us that overlap replacement is about 20% from clogging events

By seeing 2 graph below, it is show percentage after Interval Replacement was

decreased until 1,500FH, seen that from 33% Clogging problem become 30%


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Last graph told us that overlap replacement is about 50% from clogging events

Weibull Analysis :


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The Weibull formula is using the Two Parameter type:

- = 5.08 ,meant the kind of failure is wear out type

- = 1,952 Hours ,meant this hours, around 63.2% probably going failure

- MTTF = 1,794 ,meant this hours describe average time to failure ofFuel Filter

The graph above, show the probability that fuel filter will still reliable to finish itsduty to filter the fuel, the 737-900ER fuel filter MTTF showed 1,794 Hours andonly reliable with the probability of success around 52%.

6.Control Chart


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Comparison 2008, 2009 and This Year (2010)

- By looking the MTTF number, from 2,757 hours become 1,976 hours and

then 1,794 hours

- This means that the reliability of fuel filter itself become worst

Above control chart told us from 2008 (6,000 Hours Interval), 2009-Mar10 (2,000Hours Interval) and Apr10-present (1,500 Hours Interval)

We could see that the last decision regarding 1,500 Hours Interval replacementbring the closer to the fuel clogging experience

7.Suggestion


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The clogging that is caused by overlap replacement, should be minimizeduntil the littlest one, better to be nil.

To minimize the suddenly clogging either in the air or taxi phase, its better to

re-decide the interval time of fuel filter replacement.

Based on Reliability Function, the probability of success will be used

between 80 % and 100 %

80% Probability of Success will give the hours of life around 1,450

hours of interval replacement


hours of interval replacement.


hours of interval replacement

96% Probability of Success will give the hours of life around 1,100hours of interval replacement

Reliability group

Prepared by

Andrew C

Checked by:

Sabdo H

Documents

Fuel Filter Reliability Summary 737-900ER (Jul'10)