Skip to content
Zipline Zipline Service Documentation

    ATTITUDE_TRACKING_FAILURE

    published Last Updated: Oct 9, 2026 HW: all
    Applicable alarms (1)
    ATTITUDE_TRACKING_FAILURE
    Likely outcomes (12 missions, 21 issues) — click to expand

    Based on 12 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 9.5% (2 of 21 issues) Discrepancy 90.5% (19 of 21 issues)

    Frequently replaced parts

    Part P/N Removals
    BATTERY ASSY, ZIP, P2 27158 55
    T800 CCW HOVER PROPELLER, ZIP, P2 29857 15
    PARALAND ASSY, AIRCRAFT, P2 18480 10
    T800 CW HOVER PROPELLER, ZIP, P2 31101 10
    NOSECONE ASSY, DEPOP, ZIP, P2 26121 9

    Frequently co-occurring alarms (% of the 12 missions above)

    DISTRO_A_COMPUTE_A_DISQUALIFIED 100% of missions DISTRO_B_FAILOVER_TO_COMPUTE_B_ACTIVE 100% of missions DISTRO_B_COMPUTE_A_DISQUALIFIED 100% of missions COMPUTE_A_SELF_DISQUALIFIED 100% of missions LATERAL_TRACKING_FAILURE 100% of missions

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

    Background

    Section titled “Background”

    This alarm is triggered when the navigation roll or pitch value exceeds a set limit. In flight, this will trigger a paraland.

    The underlying reasons could include but is not limited to: control instability, hardware faults, or poor nav state estimates.

    Troubleshooting Steps

    Section titled “Troubleshooting Steps”
    1 escalation
    Escalate to P2 Zip Controls On Call.

    Did this guide help you get unblocked?

    Open suggestions

    There are no open suggestions.

    Open pull requests

    There are no open pull requests.

    Edit this page on GitHub
    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. 2026-06-12 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. 2026-05-10 Susan Minne Bulk/mechanical change
      Reviewed migrated topics. Edited as needed. Published.
      Commit 6199e3f
    8. 2026-05-06 Gavin Edwards Bulk/mechanical change
      Remove redundant Engineer Owner table from topic body (#298)
      Commit 1619f07 PR #298
    9. 2026-05-04 Gavin Edwards Bulk/mechanical change
      Batch 7: 47 new topics from full 4-gate pipeline
      Commit e5e26ab
    10. 2026-04-23 Gavin Edwards Bulk/mechanical change
      Replace all topics with 210 v3-generated baseline content
      Commit 9b61a6e
    11. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Categorize 373 regenerated topics into subdirectories; drop 15 meta pages
      Commit 9bdc40f
    12. 2026-04-15 Gavin Edwards Bulk/mechanical change
      Replace topic corpus: 388 LLM-regenerated topics (round 1)
      Commit f950bfa
    13. 2026-04-14 Gavin Edwards Bulk/mechanical change
      Tag all 427 topics draft with DO NOT USE warning admonition
      Commit 1783498
    14. 2026-04-08 Gavin Edwards Bulk/mechanical change
      Refactor: single TopicPage component replaces 5 individual imports
      Commit 49b5720
    Baseline import
    Initial import into service_docs
    Imported by Gavin Edwards on 2026-04-08
    Import 10 more topics (100 pages!), ownership policy, Baraza investigation
    Commit 18bf53f
    Suggest a change