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Equipment FGD-101
FM detector_obscuration
ISO 14224 mode M M
Source engineering_estimate
探测视角遮挡
FGD-101 · Fire & Gas Detector (F&G)
Related equipment → FGD-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism
Function:覆盖有效性
Failure cause:安装位移或积尘致探测盲区
Damage mechanism：视野遮挡
2Source Basis (where this FM comes from)
engineering_estimate
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by engineering_estimate.
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:EN 54-1 — Fire detection and fire alarm systems — Part 1: General and operational considerations · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 1 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
EN 54-1
No separate clause reference.
6Derived Analysis (seeded from this FM)
7/4/4FMEA Sev/Occ/Det
0.05RBI λ
0.8Monitor pdet
12 月Insp. int.
Current tasks:安装位置复核 | 遮拦检查
RCFA incident:探测视角遮挡：安装位移或积尘致探测盲区，后果类型 Safety，严重度 7
7RCM Maintenance Decision (strategy landing)
PMScheduled (Proactive) Maintenance
Recommended task功能测试/标定/校验, 按厂家与 SIL 要求周期执行
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=(无显式机理信号, 由 current_tasks 推导)
Governing standardsIEC 61511ISA 84
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。