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Zipline Zipline Service Documentation

    BATTERY_UNSAFE_TO_CHARGE

    published Last Updated: Oct 9, 2026 HW: all
    Applicable alarms (1)
    BATTERY_UNSAFE_TO_CHARGE
    Likely outcomes (252 missions, 102 issues) — click to expand

    Based on 252 missions where this alarm fired in the last 90 days as of 2026-10-13

    Grounding vs discrepancy (of 102 ZERP issues filed on these missions)

    Grounding 24.5% (25 of 102 issues) Discrepancy 75.5% (77 of 102 issues)

    Top work orders

    • EV2 Zip Detailed Battery Inspection · TROUBLESHOOTING 22
    • EV2/EV3 Perform Preflight Without Motors · INSPECTION 14

    Frequently replaced parts

    Part P/N Removals
    BATTERY ASSY, ZIP, P2 27158 119
    ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 48477 26
    TAIL ASM, STRBRD(RH), IM GNSS, ZIP, P2 0108359 20
    TAIL ASM, PORT(LH), OLD GEAR, ZIP, P2 0108336 20
    AFT MOTOR ASSY, ZIP, P2 23548 18

    Frequently co-occurring alarms (% of the 252 missions above)

    SW_BRICK_IMBALANCE_WARNING 70.6% of missions CELL_MODEM_NOT_CONNECTED 41.7% of missions STALE_CYCLE_METRICS_RECORD 36.5% of missions DIFFERENTIAL_PRESSURE_INPUT_TIMED_OUT 35.7% of missions ESR_TOO_HIGH 34.5% of missions

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

    Background

    Section titled “Background”

    The Aircraft battery is not charging due to a battery fault. This may be a critical problem, or it may resolve on its own.

    Troubleshooting Steps

    Section titled “Troubleshooting Steps”

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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 1
      Commit fdb8ff2
    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. 2026-06-22 Susan Minne
      Fix broken topic links
      Commit 891f706
    6. 2026-05-28 Susan Minne Bulk/mechanical change
      Remove redundant topic applicability banners
      Commit e561ad0
    7. 2026-05-10 Susan Minne Bulk/mechanical change
      Reviewed migrated topics. Edited as needed. Published.
      Commit 6199e3f
    8. 2026-05-09 Susan Minne Bulk/mechanical change
      Fix high-confidence internal documentation links
      Commit a6593fc
    9. 2026-05-06 Gavin Edwards Bulk/mechanical change
      Remove redundant Engineer Owner table from topic body (#298)
      Commit 1619f07 PR #298
    10. 2026-05-05 Gavin Edwards Bulk/mechanical change
      Prompt v2.2 + recover 107 demoted/false-abort topics
      Commit f7f27fe
    11. 2026-05-05 Gavin Edwards Bulk/mechanical change
      Deferred-stack retry: 68 new topics from batches 9-11
      Commit 8465278
    12. 2026-05-04 Gavin Edwards Bulk/mechanical change
      Batch 8: 26 new topics — last from impact-ranked pool
      Commit ad9327f
    13. 2026-05-04 Gavin Edwards Bulk/mechanical change
      Batch 7: 47 new topics from full 4-gate pipeline
      Commit e5e26ab
    14. 2026-04-29 Gavin Edwards Bulk/mechanical change
      Address PR #239 round-2 review: WiredComms self-link, angle-bracket self-links, stray paren
      Commit d8b3621
    15. 2026-04-24 Brian Dunlay Bulk/mechanical change
      213: Add centralized canonical escalation path entities
      Commit d3d4d8d
    16. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Resolve all user names and download all images across 210 topics
      Commit c4a31a5
    17. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Replace all topics with 210 v3-generated baseline content
      Commit 9b61a6e
    18. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Categorize 373 regenerated topics into subdirectories; drop 15 meta pages
      Commit 9bdc40f
    19. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Replace topic corpus: 388 LLM-regenerated topics (round 1)
      Commit f950bfa
    20. 2026-04-14 Gavin Edwards Bulk/mechanical change
      Tag all 427 topics draft with DO NOT USE warning admonition
      Commit 1783498
    21. 2026-04-08 Gavin Edwards Bulk/mechanical change
      Refactor: single TopicPage component replaces 5 individual imports
      Commit 49b5720
    22. 2026-04-07 Gavin Edwards Bulk/mechanical change
      Import 19 more topics, add FlowVisualizer to all topics
      Commit b2fafb6
    Baseline import
    Initial import into service_docs
    Imported by Gavin Edwards on 2026-04-07
    Import 6 more aircraft alarm topics
    Commit 45f3337
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