t

MY re /IL, PROGRAM CUANGH ROUTING SLIP " PCR/PCN #f

— - Ry ” . ANOMALY # Lt €8 [] COLOSSUS 1A _ | LUMINARY 1 _

F] COLOSSUS 2 © | _ [J LuMINARY 1A a

L. COLOSSUS 2A © [ ]LUMINARY 4B. . ,

{> COLOSSUS : , see TS ’ Ti

(_] Mir Approved PCN ' [_] NASA Approved PCR a NASA Approved _ ; i «3 [| NASA Approved PCN. . Software Anomaly

A | ae ” / MIT Approved

“a Software Anomaly A. Coding |

ae Begin coding immediately . " | _

. J oo ACTION: “Dav Q Mew <t . . , Program Supervisor: Maru, tl. dd.

Oe Do not code until new GSOP material has — approved by the MIT Mission Design Review Board MIBEB) and distributed.

B. GSOP Preparation

Prepare GSOP revisions for MDRB _ _ _

consideration ACTION: __ es

C i Cl Technical Committee Meeting not required.

[_] Technical Committee Meeting(s) held on . . ; Attendees: ; as rs

Cc. KSC Testing and Checkout

Review for possible impact on KSC

testing and checkout . ACTION: ; eee =

D. Other Programs Affected

C) Review fr corresponding changes in i , . : . Ee . ® V —— ——— = RE CENT A

. ° os ACTION:

Special Instructions ; os

rr Project Manager Leet UV hry

Date Le a 64

(Rev 1, 2/69) a - ee ye

MUTATE SOFTWARE ANOMALY REPORT fs RCFORT WO

1.2 ORIGINATOR: ~ i 2 ORGANIZATION; 1.3 OATE: 1.4 ORIGINATOR ROGRAM LUMINARY

__R. COVELLI MIT/IL ores CONTROL NO. PROGRAM REVISION

1.5 DESCRIPTION OF ANOMALY: an

A hardware restart while R12 is repositioning the landing radar

antenna will prevent the antenna from achieving position 2, and

will cause 511 alarms every 2 seconds in P64. A software restart

in the same inteval will not prevent the antenna from achieving

position 2, but use of the radar will be inhibited. CONTINUED ON PAGE

1.6 DESCRIPTION OF RUN:

Restart testing .at Grumman.

CONTINUED ON PAGE

-MIT ANALYSIS -_ 2 CAUSE:

Landing radar repositioning routine is not restart protected.

. CONTINUED ON PAGE

22 RECOGNITION: TF hardware restart shortly after P64, 511 alarms will appear.

If caused by software restart, the only recognition is that NOLRREAD

flag is set, even though antenna is in position 2, CONTINUED ON PAGE 2.3 MISSION EFFECT: ;

Landing radar data will not be used from P64 on.

: CONTINUED ON PAGE 2.4 AVOIDANCE PROCEOURE:

None. CONTINUED ON PAGE

2.5 RECOVERY PROCEDURE: Move LR position switch to hover, then set’ RPCRTIME to POSMAX and

reset NOLRREAD flag and PSTHIGAT flag: tee CONTINUED ON PAGE 2 :

2.6 PROGRAM CORRECTION: } ~ . "2 |

: Set up restart group for HIGATJOB. i

- _ CONTINUED ON PAGE |

at RECOMMENDED DISPOSITION (Fix, Work-around, etc

Fix in LUMINARY 1B. : CONTINUED ON PAGE

28 RECOMMENDED RE-TESTING:

Restart run. . 20M ype SIGNATURE: af 2.10 DATE: i CONTINUED ON PAGE cleo rT, “UC Cea hae 1s &

3.1 NASA DIRECTION: . “TT &1 CLOSING ACTION TAKEN: /

}

CONTINUED ON PAGE CONTINUED ON PAGE

3,2 NASAIMSC SIGNATURE: 3.3 ORGANIZATION 4 DATE: lie SIGNATURE: 43 ORGANI pe

USC Form 1409 (Rev May 68)

PAGE I or 2

° s wa

1 ORIGINATOR:

R. COVELLI —_—_—_—

er

1.2 ORGANIZATION:

MIT/IL

2.5 Recovery Procedure:

V21N1E 3427E 37777E

V25N7E 107E

MSC Form 1409A (May 68) a

3000E OE

MIT/IL SOFTWARE ANOMALY ts DATE:

7/10/69

REPORT

CONTROL KO. ~ " ORIGINATOR

| L

PROGRAM _ LUMI

(MSCREPORT A. CtC~S*dY

PROGRRA REVISION 99 |

i.

Nye8_| NARY