This addendum updates the System Failure Mode, Effects and Criticality Analysis (FMECA) for the Passive Seismic Experiment (PSE) Array A-2D, and E to the date of this addendum.prepared by R.W. Hiebert.B-

Hiebert, Robert W.

USRA Houston Repository

I Reliability Failure Mode, Effects and Criticality Analysis 
Addendum 2 PSE · 
ATM501 I B-2 
PAGE OF 'f 
DATE 8/6/71 
This addendUin updates the System FMECA for the PSE Array A-2D, and E 
to the date of this addendum. 
The changes noted in Table I of this addendum are mee:I!Am9al in nature and 
in no way effect the system FMECA for the PSE included in A TM 501 B. The 
component level FMEA is given in a Teledyne ~ocument dated 6/6/68 
Revision "A"· There is no cHanges to the sibg'l~ 'point failure sutnm.ary. 
Prepared by:~ ;::pv~ 
R. W. Hiebert 
Reliability Engineer 
Approved by: //-tfl!Jtl- . .....,. 
~lt· S. J. Ellison, Manager 
Q"- ALSEP Reliability 
1-
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Description 
Reliability Failure Mode, Effects 
and Criticality Analysis 
A.cldendum 2 PSE 
TABLE I 
Revision Present Flight 
Utilized Configuration 
Central Station Electronics 
Power Converter 234526C 234526D 
"B II P/L 234525F P/L 234525G 
Power Converter 23463IC 234631C 
P/L 234630D P/L 234630E 
Level Switch & 234621-1A 234621-1A 
Trigger Generator 234621-ZA 234621-ZA 
X, Y, and Z P/L 234620-IB P/L 234620-1C 
P/L 234620-2B P/L 234620-2B 
Long Period 2346I6A 234616B 
Electronics X, P/L 234615-1C P /L 234615-1D 
Y, and Z Axis P/L 234615-2C P /L 234615-2D 
Short Period 234521 N/C 234521 N/C 
Electronics P/L 234520D P/L 234520E 
Calibration 234606 N/C 234606 N/C 
Attenuator P/L 234605 N/C P/L 234605A 
Digital 23445IC 234451C 
Electronics P/L 234450A P/L 234450A 
P/L 234465C P/L 234465C 
P/L 234480C P/L 234480C 
Analog to T-13010C T-13010C 
Digital Converter 
ATM?QJ I B-2 
PAGE ~ OF :1.· 
DATE 8/6/71 
Effect on Reliability 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
Description 
Sensor Electronics 
X Axis 
Electronics 
Y Axis 
Electronics 
Z Axis 
Electronics 
Sensor 
Electronics "W" 
Board 
Long Period 
Preamplifier 
Long Period 
Calibration 
Z Axis 
Long Period 
Calibration 
X andY Axes 
Short Period 
Calibration 
Electro-Mechanical 
Upper Platform 
Assembly 
· Reliaa.bility Failure Mode, Effects 
and Criticality Analysis 
Addendum 2 PSE 
TABLE I (Continued) 
Revision Present Flight 
Utilized Configuration 
234556C 234556C 
P/L 234555E P/L 234555H 
23456ID 234561D 
P/L 234560G P/L 234560H 
234541C 234541C 
P/L 234540E P/L 234540G 
234571C 234571D 
P/L 234570D P/L 234570E 
234376A 234376A 
P/L 234375H P/L 234375H 
234385G 234385G 
P/L 234385-lF P/L 234385-lF 
234385G 234385G 
P/L 234385-2F P/L 234385-2F 
234380D 234380D 
P/L 234380C P/L 234380C 
233249F 233249F 
P/L 233249G P/L 233249G 
.·ATM 501 I B-2 
PAGE j OF 4 
DATE 8/6/71 
Effect on Reliability 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
No Change 
; { : • " ~ }i 7 
~\II> 
"' ' 
~ ~ 5 ' 
Description 
Reliability Failure Mode, Effects 
and Criticality Analysis 
Addendum 2 PSE 
Revision 
Utilized 
TABLE I (Continued) 
Present Flight 
Configuration 
Electro-Mechanical (Continued) 
Gimballed 
Platform 
Base Assembly 
Array E 
Array A-2 
Array D 
Sensor Assembly 
Array E 
Array A-2 
Array D 
Thermal Control 
Array E 
Array D 
Array A-2 
Leveling Stool 
Assembly 
Array A-2 
Array D 
Array E 
233225N 
233275P 
233425L 
(SN03) 
(SN01) 
(SN08) 
233411J 
233400C 
(SN07) 
(SN09) 
2341602A 
2341603F-
-502 
-503 
2341604F-
-502 
-503 
2338016P 
No Dash# 
No Dash# 
-501 
2344723 
No Dash# 
-501 
No Dash# 
or -501 
ATM 501 I B-2 
PAGE OF 4 
DATE 8/6/71 
Effect on Reliability 
No Change 
Addition of Heaters 
will not effect 
reliability prediction 
or FMECA 
Mechanical changes 
to short period 
sensor. No effect 
on reliability prediction 
or FMECA 
Changes to add more 
heater power. No 
effect on reliability 
prediction or FMECA 
No Change 


Reliability failure mode, effects, and criticality analysis : addendum 2 PSE

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Reliability failure mode, effects, and criticality analysis : addendum 2 PSE

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