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Zipline Zipline Service Documentation

    WINCH_CUTTER_DEPLOYED

    published Last Updated: Oct 9, 2026 HW: all
    Applicable alarms (3)
    WINCH_CUTTER_DEPLOYEDZIP_EXECUTIVE_V4_DROID_LEFT_BEHINDDROID_LEFT_BEHIND
    Likely outcomes (1,064 missions, 2,378 issues) — click to expand

    Based on 1,064 missions where this alarm fired in the last 90 days (for DROID_LEFT_BEHIND) as of 2026-10-13

    Grounding vs discrepancy (of 2,378 ZERP issues filed on these missions)

    Grounding 8.1% (192 of 2,378 issues) Discrepancy 91.9% (2,186 of 2,378 issues)

    Top work orders

    • EV2: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 626
    • Inspect Droid after Droid Left Behind (DLB) · MAINTENANCE_ACTION 428
    • EV3: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 337
    • Reset Droid after DLB · REPAIR 291
    • V4 Zipping Point: Inspect Zipping Point after Droid Left Behind (DLB) - Ranger · MAINTENANCE_ACTION 157

    Frequently replaced parts

    Part P/N Removals
    ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 48477 1,201
    WINCH, ASSY, ZIP, P2 24078 304
    DOCKING FIN WINCH ASSY, ZIP, P2 24084 165
    PARALAND ASSY, DROID, P2 18427 126
    LEFT DOOR ASSY, DROID, P2 21830 105

    Frequently co-occurring alarms (% of the 1,064 missions above)

    WINCH_CUTTER_DEPLOYED 97.6% of missions WINCH_MOTOR_DISABLED 96.8% of missions SQUIB_PORT_DEPLOYED 93.3% of missions WINCH_FREEWHEEL_LATCHED 14.5% of missions DROID_LEFT_BEHIND_IN_AUTOKIOSK 11.4% of missions

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

    Background

    Section titled “Background”

    The winch cutter squib has deployed, likely as part of a droid left behind event.

    Troubleshooting Steps

    Section titled “Troubleshooting Steps”
    1 question
    Has the Droid been left behind? How to Check if Droid is Left Behind.

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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 Emily London
      Delete winch hardware fault guide
      Commit 9340771
    3. 2026-09-24 Susan Minne Bulk/mechanical change
      chore: backfill aircraft owner identities batch 4
      Commit d9b2270
    4. 2026-09-23 Susan Minne Bulk/mechanical change
      chore: complete Confluence metadata cleanup
      Commit bff0aa1
    5. 2026-09-22 Richard Baverstock
      Consolidate Droid left behind alarms
      Commit 820ef3c
    6. 2026-09-13 Susan Minne Bulk/mechanical change
      feat: add MX approval metadata to topics
      Commit 406a785
    7. 2026-08-27 Susan Minne
      Add-DLB-discrepancy-step
      Commit 58d7816
    8. 2026-08-26 Susan Minne
      Update WINCH_CUTTER_DEPLOYED DLB guidance
      Commit 734f887
    9. 2026-05-28 Susan Minne Bulk/mechanical change
      Remove redundant topic applicability banners
      Commit e561ad0
    10. 2026-05-14 Susan Minne Bulk/mechanical change
      Review of migrated topics and set to published
      Commit d5f3ec5
    11. 2026-05-11 Gavin Edwards Bulk/mechanical change
      Resolve 44 duplicate procedures/topics pages (#397)
      Commit 88969fd PR #397
    12. 2026-05-06 Gavin Edwards Bulk/mechanical change
      Remove redundant Engineer Owner table from topic body (#298)
      Commit 1619f07 PR #298
    13. 2026-04-24 Brian Dunlay Bulk/mechanical change
      213: Add centralized canonical escalation path entities
      Commit d3d4d8d
    14. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Resolve all user names and download all images across 210 topics
      Commit c4a31a5
    15. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Fix CI validation: descriptions, owners, empty steps, null values
      Commit 8a14a4a
    16. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Replace all topics with 210 v3-generated baseline content
      Commit 9b61a6e
    17. 2026-04-20 Gavin Edwards Bulk/mechanical change
      Replace all topics with 17 v3-generated priority topics + component fixes
      Commit 2d64693
    18. 2026-04-20 Gavin Edwards
      Add 17 priority topics generated with subagent-v2 prompt
      Commit 6afc05f
    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. 2026-04-10 Gavin Edwards Bulk/mechanical change
      Fix 47 validation errors: question types, missing steps, invalid status/owner enums
      Commit 4183f19
    Baseline import
    Initial import into service_docs
    Imported by Gavin Edwards on 2026-04-10
    Import TG202615 aircraft topics (chunk 4 batch 2)
    Commit fe8745e
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