USA SAFER Panel Meeting Minutes August 31, 2000
USA SAFER Panel
Meeting Minutes
August 31, 2000
The SAFER Panel met at JSC on August 31, 2000 in Building 1 room 360 at 10:00 a.m.
Meeting participants:
Panel Chair XA/ Anh Huynh
Panel Secretary HSMS/ Theresa Elms
Panel Members DX/ Kenny Vassigh
ER/ Kevin Lewis
EP/ Eric Darcy
NC/ Ron Cook
NT/ Richard Bussey, Rafiq Hashmani
USA/ Leonel Cruz, Armon Knight
The following items were discussed:
1. Flight Readiness
- STS—106 (2A.2b) Manifest Support
ER sent a draft STS-106 memo to DX/Mary Fitts 08/31/00 which presented the status for each of the three SAFER units.
- STS—92 (3A) Manifest Support
SAFER units S/Ns 1004 and 1006 and one —305 battery S/N 1022 were shipped on 08/31/00 to support bench review at USA.
- STS—97 (4A) Manifest Support
ER/Kevin Lewis and USA/Armon Knight will develop a fit check plan for STS-97 (4A) once the PLSS issues have been resolved.
2. FIAR/DR Closure Status
- JSC-ER0027, Thruster Firing Failure at 150 deg. F (Open 143 days)
Thermal enhancements on SAFER units 1003, 1005, and 1007 need to be completed and the root cause for component over heating needs to be explained before JSC-ER0027 can be closed.
- IDR #5H0060020, Low NSI Current Trace During Acceptance Testing Setup
During setup of s/n 1004 for acceptance testing, the NSI current trace was displayed at 10V instead of the expected 20V range. The cause was determined to be incorrect configuration of the oscilloscope used. The procedure was modified to prevent the problem from recurring in the future. The IDR was closed.
3. Configuration Control
- Hardware/Software Configurations
No change. The thermal enhancements were installed in s/n 1004 and s/n 1006 for STS-92.
- CR Implementation
- CR H-0670 R1, AAH LED Function Modification
Only one SAFER unit (SN 1007) still needs the AAH LED function modification. All others (including the VRL unit) have been modified.
- CR H-0683, On-Orbit Stowage Bag
The On-orbit Stowage Bag certification will be documented with a Requirement Short Form, a Short Form Hazard Analysis and a completed GCAR. The SMART will review and sign off the Short Form Hazard Analysis and an Initial Assessment of Criticality (IAC).
- CR H-0749, SAFER On-Orbit Trainer
On hold until funds become available during the next fiscal year.
- CR H-0752 R1 Inhibit Plug Installation Verification
The Inhibit Plug Installation CR will be shelved until further notice XA will revisit this topic in the future, if necessary.
- CR H-0753 R1 Power Switch Guard Modification
Design concepts are still in work by ER.
- CR H-0760 SAFER NBL & 1-G Hi-Fi Mockup Upgrades
No changes.
- CR H-0788, -305 SAFER Battery Design, Fabrication & Implementation
SR&QA EEE Parts Engineers have stated that a 100 mission certification for the —305 batteries will be granted only if one of the following two options are performed:
- Radiation testing is performed on the battery gauge board
- A current limiting resistor is added to the circuit board so that if the transistor, resistor or IC circuit fails due to radiation damage, the battery will not bleed down to an unacceptable level during a 7 hour EVA.
EP/Eric Darcy stated that EP only had eight battery boards available, which was enough to provide four batteries for STS-106 and four batteries for STS-92. Battery boards will be purchased to begin the buildup of the remaining twelve batteries (which are scheduled to be completed on 02/28/01).
- CR H-0865, SAFER Thermal Enhancements
ER/Kevin Lewis will provide NC/Ron Cook with completed certification test documents so that he may begin preparing the certification paperwork for the SAFER —309 configuration.
Proposed CR’s
- CR H-0749 R1, SAFER On-Orbit Trainer
On hold until funds become available in the next fiscal year.
- CR H-0806,-307 Rechargeable Battery CR
On hold pending funding from XA in the next fiscal year.
- CR H-0843, Latch Redesign
On hold until hi-fi mockup latches can be replaced with flight-like latches.
- Extension of HCM Deployment Actuator and the Manual Isolation Valve Actuator
CR draft in work.
- IMS Labeling
CR draft in work.
- On-Orbit Stowage Bag Docking Loads
CR draft in work.
- Issues
USA stated that five new Hi-Fi NBL SAFER units are needed due to the deteriorated condition of the existing ones. A CR to the MV CCB will be submitted.
5. Special Topics
- None.
- EHB Presentation
None.
- CCB Presentation
None.
- PRCB presentation
- Action Items
None.
- USA/Armon Knight will determine if the SAFER units on 3A and 4A have been fit checked with a flight PLSS in the past.
Submitted by: Approved by:
(Original signed by) (Original signed by)
Theresa M. Elms Anh H. Huynh
SAFER Panel Secretary USA SAFER Panel Chairman
Item | Assignee | Description | Status |
06-01 | C. Price
J. Smith | Evaluate the MPLM environment for launch/landing of the USA SAFER. | 06/25/99: Assigned. 07/29/99: In review by ER. ER as needed will request additional information. 08/05/99: ER needs information on directional G-loads during launch, landing, and emergency landing. 08/06/99: Additional MPLM information was provided by OM/E. Smistad. 08/11/99: ER will provide a cost and schedule estimate for the additional stress analysis. 08/26/99: ER estimated a cost of 32K and a schedule for 2 months. The task will be initiated by XA on 10/01/99 with FY00 funding. 10/28/99: Partial funding has been sent to ER on 10/21/99 & 10/29/99. ER to complete the evaluation with an ECD of 01/03/00. 12/02/99: ER will provide a new ECD due to time needed to turn the effort on through a task order. 01/06/00: ER provided a new ECD of 03/15/00. 03/30/00: ER has requested a new ECD from LM. New ECD of TBD. 04/06/00: The stress analysis is complete. The memo will be out soon, ECD 04/13/00. 04/20/00: ECD TBD. 05/04/00: The stress analysis is in the LM signature loop. 05/11/00: LM/James Shu presented the results of the MPLM stress analysis to the Panel. James Shu will provide ER with a memo summarizing the results. ER will forward the memo to XA. XA will discuss the angular acceleration topic with the MPLM group and ER will discuss with ES. 05/12/00: ES confirmed the need to include the angular acceleration in the analysis. 05/16/00: Awaiting MPLM contact person to be provided by XA I&O lead for 5A.1. 05/18/00: ER provided the analysis performed by LM. 05/25/00: ER is waiting for a response from the MPLM stress analyst. New ECD: TBD. 06/15/00: ER will meet with the MPLM contact person on 06/15/00. 06/22/00: The MPLM stress analysis is presently in review with the MPLM stress analyst. 07/13/00: The MPLM stress analyst (Satya Pilla) has provided additional MPLM launch/landing environment information. James Shu is reviewing the environment information. 07/20/00: The MPLM stress analyst has indicated that the SAFER can be launched in the MPLM. XA is waiting on the official confirmation from the MPLM group. 08/24/00: XA discussed the action with MPLM representative. New ECD 09/07/00. |
07-04 | K. Lewis | Provide a video recording of 1) NSI/Pyro Valve firing, 2) dry valve seating, 3) wet valve seating, 4) dry valve self-test, and 5) wet valve self-test. | 06/25/99: Assigned as action 02-03 at the STS-96 USA SAFER IFA Investigation meeting. 07/09/99: Transfer action to USA SAFER Panel. 08/05/99: Recording completed except for NSI/Pyro Valve firing. ECD of TBD, pending available opportunity. |
00-02-08 | K. Lewis
A. Huynh | ER will initiate a stress analysis to determine how far the HCM deployment actuator and manual valve can be extended. | 02/17/00: Assigned. ECD TBD. 02/24/00: EV/James Shu stated that the SAFER actuator supporting bracket needs to be changed if the actuator is extended. 05/04/00: The stress analysis is on hold while the small and x-large EMU managers perform SAFER reach evaluations with suited subjects to determine how far to extend the actuators. ECD: 05/19/00. 05/25/00: XA will initiate a CR for 2" extension to the actuators. |
00-04-11 | P. McCartney K. Vassigh | Provide a video of the on-orbit trainer evaluation (SSC) as shown at the VRL and more technical information on the data rate specifications. | 04/20/00: Assigned. ECD TBD. 06/15/00: DX will record on-orbit trainer evaluation (SSC) on video. ECD TBD. |
00-05-01 | K. Lewis T. Elms
A. Huynh K. Lewis | ER will evaluate SAFER launch/ landing loads in the SpaceHab. HSMS will locate SpaceHab Load Requirements. | 05/04/00: Assigned. ECD 05/20/00. 05/25/00: XA provided launch/ landing load requirements to ER. Waiting for ER discussion with contact person from SpaceHab. ECD of 06/01/00. 06/15/00: ER/Kevin Lewis requested James Shu contact the LESC stress analyst to determine if the IDD document prepared by LESC includes angular accelerations for the SpaceHab loads. XA will investigate if different loads apply to the SpaceHab rack. New ECD TBD. 06/29/00: SpaceHab determined that SAFER will not be stowed in the rack, only on the floor. ER is expected to complete the loads analysis by 07/25/00. 08/10/00: Report is completed and is ready for distribution, ECD 08/17/00. 08/17/00: ER has received a copy of the loads analysis report. ER will send a copy of the executive summary page to XA. New ECD: 8/24/00. 08/31/00: ER sent a copy of the executive summary to XA on 08/25/00. Closed. |
00-05-06 | K. Lewis | ER will determine the cost to build one more flight SAFER. | 05/18/00: Assigned. ECD 06/16/00. 06/22/00: New ECD: TBD. 06/29/00: XA requests that ER look into getting a contractor to build another flight SAFER. 07/13/00: New ECD: 9/30/00. |
00-05-07 | K. Lewis
T. Elms | ER will investigate the problem with the weight relief lifting sling and the SAFER latches. | 05/18/00: Assigned. ECD 06/01/00. 05/25/00: HSMS will verify that a comprehensive procedure is used to operate the weight relief lifting sling in order to prevent any damages to the SAFER latches. 06/15/00: New ECD 07/06/00. 07/06/00: HSMS determined that a comprehensive procedure to operate the weight relief lifting sling did not exist and that one needed to be written and released as a SSA Class III operational procedure. ECD 08/18/00. 07/13/00: HSMS has written a procedure detailing how to attach the SAFER to the EMU when using a weight relief lifting sling. The procedure is presently in review with Steve Anderson of the SSI group. 07/20/00: HSMS/T. Elms received comments to incorporate from ILC/Steve Anderson. Next the procedure needs to be reviewed by ER. 07/27/00: HSMS is searching for a picture showing the EMU/SAFER in the weight relief-lifting sling. 08/10/00: HSMS sent the procedure to ER/Kevin Lewis for review on 08/07/00. 08/17/00: HSMS will rewrite the procedure "real-time" as Gail Steel performs the steps on the engineering unit. New ECD: 8/31/00. 08/31/00: HSMS rewrote the procedure. Gail Steel reviewed and provided his inputs. The procedure is ready for release. |
00-06-01 | K. Lewis | ER will provide DX with a video tape of the following operations for training:
class III PLSS & SAFER engineering unit)
SAFER Transfer/Stow ops (both the launch/entry and on-orbit stowage bags from USA/FCE) | 06/15/00: Assigned. ECD TBD. 07/13/00: DX and ER will develop a mutually agreed schedule to complete the activities. 08/31/00: New ECD: 09/05/00. |
00-07-02 | K. Lewis & A. Knight | ER/Kevin Lewis and USA/Armon Knight need to develop a fitcheck plan for STS-92 (3A). | 07/06/00: Assigned. ECD:07/20/00. 08/10/00: New ECD: 09/15/00. |
00-07-05 | M. Hembree | Investigate if the ERCM will be used in an EVA before the DTO, creating a glove cut hazard on the tether. | 07/20/00: Assigned. ECD 08/10/00. |
00-07-06 | All | Submit any post-flight DTO questions for the STS-92 crew to DX/Mike Hembree. | 07/20/00: Assigned. ECD 08/10/00. |
00-07-07 | D. Tani C. Nicollier | Provide a consensus on DTO pass/fail criteria for STS-92 DTO 689. | 07/20/00: Assigned. ECD 08/10/00. 08/17/00: New ECD: 08/31/00. 08/24/00: New ECD: 09/07/00. |
00-07-08 | M. Hembree | Provide a DTO backup plan in case of RMS failure. | 07/20/00: Assigned. ECD 08/10/00. |
00-08-01 | K. Lewis | Provide a summary of the software DCR to XA. | 08/03/00: Assigned. ECD TBD. 08/31/00: ER provided the software DCR summary on 08/31/00. Closed. |
00-08-02 | K. Lewis | Provide a formal memo to DX/Mary Fitts before STS-106 that gives the status for each SAFER unit. | 08/03/00: Assigned. ECD TBD. 08/17/00: New ECD: 09/01/00. 08/31/00: ER sent a draft STS-106 memo to DX/Mary Fitts 08/31/00 which presented the status for each of the three SAFER units. |
00-08-03 | E. Darcy | Provide a work instruction for inspection of incoming electrical parts. | 08/03/00: Assigned. ECD 09/11/00. 08/17/00: New ECD: 09/01/00. |
00-08-04 | E. Darcy | Contact Dave Homan or Jeff Hoblit/VRL to determine whether the battery simulation in the VRL is realistic. | 08/03/00: Assigned. ECD 09/01/00. 08/17/00: New ECD: 08/25/00. 08/24/00: EP/Eric Darcy gave Jeff Hoblit instructions on how the VRL should be simulating the battery on 08/23/00. Jeff Hoblit will check his VRL algorithms against Eric’s instructions and report the results of the comparison. New ECD: 08/28/00. 08/31/00: Jeff Hoblit investigated how the VRL simulates the battery and is presently incorporating EP’s changes. New ECD: TBD. |
00-08-06 | K. Lewis | Provide a ROM on the following new latches: 1 — set of Class I tower latches 3 — sets of Class III tower latches | 08/17/00: Assigned. ECD TBD. |
00-08-07 | C. Mooty | Provide a ROM on the following new latches: 1 — set of Class I tower 3 — sets of Class III tower latches | 08/17/00: Assigned. ECD TBD. 08/24/00: New ECD: 09/07/00. 08/31/00: New ECD: 09/28/00. |
00-08-08 | K. Lewis A. Knight | ER/Kevin Lewis and USA/Armon Knight need to develop a fitcheck plan for STS-97 (4A). | 08/24/00: Assigned. ECD 09/07/00. |
00-08-09 | T. Elms K. Lewis | Prepare a configuration matrix for STS-106, STS-92 and STS-97 and document what the differences are between the configurations. | 08/24/00: Assigned. ECD 08/31/00. 08/31/00: The configuration matrix was sent for ER’s review on 08/28/00. New ECD: 09/08/00. |
00-08-10 | A. Knight | Determine if the SAFER units for 3A and 4A have been fit checked with a flight PLSS in the past. | 08/31/00: Assigned. ECD 09/07/00. |
