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NASA-LLIS-5003: Lessons Learned – Combined First Stage Aft Skirt Umbilical
Abstract: Combining the functions of two umbilicals into a single umbilical reduces risks at liftoff.
NASA-LLIS-3716: Lessons Learned - Testbed Limitations May Impact End-to-End Flight System Testing
Abstract: Abstract:
After 11 year of spaceflight, it was discovered that the dual string Stardust/NExT spacecraft was incapable of switching to the redundant flight system. Flight software changes made only 3 ...
After 11 year of spaceflight, it was discovered that the dual string Stardust/NExT spacecraft was incapable of switching to the redundant flight system. Flight software changes made only 3 ...
NASA-LLIS-1713: Lessons Learned - Simulate the Launch Site RF Configuration During I&T
Abstract: Abstract:
Science data losses during compatibility testing at the CloudSat launch site were traced to an RF cabling configuration that differed from the cables, couplers, and attenuators used during ...
Science data losses during compatibility testing at the CloudSat launch site were traced to an RF cabling configuration that differed from the cables, couplers, and attenuators used during ...
NASA-LLIS-1760: Lessons Learned – Process Control to Prevent Incorrect Assembly (Video Lesson)
Abstract: Abstract:
A video clip lesson learned on the topic of Process Control. Actuators inside the tail enable the rudder speed brake panels to steer and slow the Space Shuttle during descent and landing. ...
A video clip lesson learned on the topic of Process Control. Actuators inside the tail enable the rudder speed brake panels to steer and slow the Space Shuttle during descent and landing. ...
NASA-LLIS-6216: Lessons Learned - MSL Mobility Assembly Lift Mishap
Abstract: JPL flight hardware was damaged during a lift operation preceding a test of the MSL rover Mobility Assembly due to an undetected mechanical interference that was signaled by an anomalous load cell reading. The load cell ...
NASA-LLIS-1771: Lessons Learned - Ensure That Items Separated In Flight Will Not Collide
Abstract: Abstract:
The potential for separated items to regain contact and damage the spacecraft has posed a significant risk to recent, current, and planned JPL missions, and it may have been a factor in the ...
The potential for separated items to regain contact and damage the spacecraft has posed a significant risk to recent, current, and planned JPL missions, and it may have been a factor in the ...
NASA-LLIS-2536: Lessons Learned - Excess Cooling of MRO HiRISE Sunshade
Abstract: Abstract:
A routine in-flight MRO spacecraft sequence placed the HiRISE instrument in an attitude where the sunshade was shaded for an extended period. This unexpectedly caused the sunshade to drop ...
A routine in-flight MRO spacecraft sequence placed the HiRISE instrument in an attitude where the sunshade was shaded for an extended period. This unexpectedly caused the sunshade to drop ...
NASA-LLIS-1799: Lessons Learned – Erroneous Onboard Status Reporting Disabled IMAGE's Radio
Abstract: Abstract:
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
NASA-LLIS-1725: Lessons Learned - Control Blow-By From Pyrotechnic Devices (2006)
Abstract: Abstract:
Significant leakage or "blow-by" of combustion products past the seals within a pyrotechnic cable cutter was detected during pyroshock testing of Mars Exploration Rover. Optical flight ...
Significant leakage or "blow-by" of combustion products past the seals within a pyrotechnic cable cutter was detected during pyroshock testing of Mars Exploration Rover. Optical flight ...
NASA-LLIS-1743: Lessons Learned – Mitigating the Risk of Single String Spacecraft Architecture
Abstract: Abstract:
Mars Exploration Rover met and exceeded mission requirements despite a largely single string spacecraft architecture. Balance the risk of a single string flight system with effective risk ...
Mars Exploration Rover met and exceeded mission requirements despite a largely single string spacecraft architecture. Balance the risk of a single string flight system with effective risk ...