Boeing Defense, Space & Security
Vertical Lift
AH-64E System-Level
Embedded Diagnostics
(SLED)
RAM7 Conference
November 2014
Derek S. Fok
Supportability Engineering
Apache Programs
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ITAR Export Regulations.
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RAM 7 Conference 2014
SLED-STAMP Integrated Product Team
System-Level Embedded Diagnostics
Smart Tool 4
Aviation Maintenance Picture
SLED-STAMP is the result of a successful government and industry partnership.
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RAM 7 Conference 2014
Why SLED-STAMP?
• Problem = Lack of Maintenance Situational Awareness
• Solution = Real Time “TOOL” = SLED-STAMP
o Maintenance planning (P4T2) based on real-time, over-the-air fault reports
o Improved accuracy and consistency in fault reporting
o Provides Maintenance Production Control with useful planning data
o Reduces troubleshooting time; potential increases in availability
Maintenance Concept of Operations (CONOPS) driven design
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RAM 7 Conference 2014
What data does the SLED Report provide?
•
•
•
•
•
•
Power-up date/time: for linking to ULLS-A and MDR data
Location data: critical for planning DART missions
Aircraft tail number: for identification of reporting aircraft
In-air status: shows aircraft as in-air/on the ground at time of message
SLED Results: Fault isolation to the line replaceable unit (LRU)
WCAs/Faults/Exceedances: Crew station data filtered for maintenance
relevant information (ie, suppressed COM and NAV advisories)
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4
RAM 7 Conference 2014
SLED Report Auto-Transmit Cases
SLED – Auto
Case
Trigger
Checks
SLED – Flight
Takeoff / Landing
SLED – Mayday
SLED Report data
Upon Aircraft TakeMAYDAY = Send
(EMER XPNDR or Manual)
posted = New
off/Landing
TI ready
TI ready
TI ready
Valid recipients loaded Valid recipients loaded Valid recipients loaded
Transition from groundAircraft is in the air
to-air or air-to-ground
Auto-transmit enabled Auto-transmit enabled
-
SLED - Manual
MAIL SLED Report =
Operator Send
TI ready
Valid recipients loaded
-
SLED Report Recipients
EXAMPLES
Maintenance
DART
C2
OTHER
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5
RAM 7 Conference 2014
STAMP FOT&E Prototype Production Control Display
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6
RAM 7 Conference 2014
STAMP Future Interfaces
PC Dashboard
Mobile App
Active Report View
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RAM 7 Conference 2014
Improvements to Maintenance Situational Awareness
• Better on-board data
o
o
o
o
Processing is on mission processors = no additional hardware
Discriminates between primary and secondary fault indications
Uses fault patterns to isolate faults to the line replaceable unit (LRU)
Fault patterns and fault correlations are based on a data table that can be
updated between aircraft software releases
• Improving the reported data
o Reporting uses existing Apache BFT hardware for non-line of sight reporting
o Reporting uses a data table based filter that prevents non-maintenance
warning, caution, advisory (WCA), and fault codes from causing reports
• New maintenance tools
o STAMP ground software runs on standard Windows PCs, interfacing to
existing USG FBCB2/JBC-P hardware
o STAMP GUI interface uses SLED Reports to provide maintenance users with
near real-time information about where the aircraft is and what faults and
WCAs the pilot is seeing
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RAM 7 Conference 2014
SLED future enhancements
Sensor upgrades to improve data quality and fidelity.
Data analytics to support real-time, on-board fault isolation.
SLED Mission Processor
Architecture
SLED is the on-ramp for future diagnostic and prognostic improvements, providing capabilities
for real-time, on-board processing, storing, and reporting maintenance data.
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