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Zipline Zipline Service Documentation

    Battery Status Unavailable

    published Last Updated: Oct 9, 2026 HW: all
    Applicable alarms (1)
    ZIP_BATTERY_STATUS_UNAVAILABLE
    Likely outcomes (71 missions, 21 issues) — click to expand

    Based on 71 missions where this alarm fired in the last 90 days as of 2026-10-13

    Grounding vs discrepancy (of 21 ZERP issues filed on these missions)

    Grounding 19% (4 of 21 issues) Discrepancy 81% (17 of 21 issues)

    Frequently replaced parts

    Part P/N Removals
    LEFT DOOR ASSY, DROID, P2 21830 18
    RIGHT DOOR ASSY, DROID, P2 21827 18
    PARALAND ASSY, DROID, P2 18427 14
    BATTERY, DROID, P2 24544 12
    BRAIN, LRU, DROID, P2 31920 10

    Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.

    Background

    Section titled “Background”

    This alarm triggers if the zip executive does not receive a battery message reported by the distro within the watchdog timeout.

    Often this alarm is caused by a distro a or battery status reporter crashing, running at too slow of a rate, or publishing too infrequently. This alarm can also be caused by compute performance issues and IPC issues (these cases often see multiple watchdog alarms). If this persists throughout preflight and causes a mission failure, follow the steps below.

    Exec watchdog alarm

    Section titled “Exec watchdog alarm”
    • ZIP_BATTERY_STATUS_UNAVAILABLE

    Troubleshooting Steps

    Section titled “Troubleshooting Steps”
    1 escalation
    Try resending a mission. If this problem persists, escalate to P2 Firmware Power On Call.

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    Topic history
    1. 2026-10-07 Susan Minne Bulk/mechanical change
      Replace individual guide ownership with system technical contacts
      Commit dca5a1a
    2. 2026-09-24 Susan Minne Bulk/mechanical change
      chore: backfill aircraft owner identities batch 4
      Commit d9b2270
    3. 2026-09-23 Susan Minne Bulk/mechanical change
      docs: remove obsolete Confluence metadata
      Commit 2d5374e
    4. 2026-09-13 Susan Minne Bulk/mechanical change
      feat: add MX approval metadata to topics
      Commit 406a785
    5. 2026-06-12 Susan Minne Bulk/mechanical change
      Update troubleshooting topics and escalation paths
      Commit 166da10
    6. 2026-05-28 Susan Minne Bulk/mechanical change
      Remove redundant topic applicability banners
      Commit e561ad0
    7. 2026-05-19 Richard Baverstock Bulk/mechanical change
      Migrate watchdog docs to Exec alarm guides
      Commit 96479ac
    8. 2026-05-11 Susan Minne Bulk/mechanical change
      Update troubleshooting topics and links
      Commit 0aa9df2
    9. 2026-05-06 Gavin Edwards Bulk/mechanical change
      Remove redundant Engineer Owner table from topic body (#298)
      Commit 1619f07 PR #298
    10. 2026-05-04 Gavin Edwards Bulk/mechanical change
      Batch 8: 26 new topics — last from impact-ranked pool
      Commit ad9327f
    11. 2026-04-20 Gavin Edwards Bulk/mechanical change
      Replace all topics with 17 v3-generated priority topics + component fixes
      Commit 2d64693
    12. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Categorize 373 regenerated topics into subdirectories; drop 15 meta pages
      Commit 9bdc40f
    13. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Replace topic corpus: 388 LLM-regenerated topics (round 1)
      Commit f950bfa
    14. 2026-04-14 Gavin Edwards Bulk/mechanical change
      Tag all 427 topics draft with DO NOT USE warning admonition
      Commit 1783498
    Baseline import
    Initial import into service_docs
    Imported by Gavin Edwards on 2026-04-10
    Import TG202615 aircraft topics (chunk 4 batch 3)
    Commit b66a338
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