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Equipment AC-201A
FM fm_6
ISO 14224 mode STD Structural deficiency
Source OPC Ontology KB
Blade Fatigue Crack
AC-201A · Air cooler
Related equipment → AC-201A
0.75Source conf.
0.75Evidence conf.
STDISO 14224 mode
1Failure Mechanism
Function:实现设备功能
Failure cause:叶片材料疲劳强度不足；运行中振动过大；制造缺陷（如气孔、夹杂）
2Source Basis (where this FM comes from)
OPC Ontology KBCSB Accident DBQuant benchmark
Source confidence 0.75: this FM is derived from the ontology KB and cross-validated by OPC Ontology KB·CSB Accident DB·Quant benchmark.
3Evidence Chain (supporting basis)
Evidence text：Fatigue safety factor of a transonic centrifugal compressor impeller (2025, cited 2)
Evidence ref code：S2:3261cc863dbbb7c4
Evidence conf.：0.75 · Evidence source：academic_study
⚠ The evidence ref code S2:3261cc863dbbb7c4 is an internal index code of this KB, for tracing back to the offline curated corpus; it is not a public doi.org link, hence no hyperlink is provided.
Governing standards (evidence)：ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_33ff8131b5334d53b2789bdf1e4abda87458030677405755 — ITP-1 Air Cooled Exchangers（杜邦制造质量检验测试计划）
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
API 580GB/T 7826-2012ISO 14224:2016SAE JA1011_202411
Standard clause references (19):
GB/T 7826-2012GB/T 27921-2011GB/T 44958-2024GB/T 4888-2008GB/T 29639-2020AQ/T 3034-2022API 581API 580API 510API 571API 579-1/ASME FFS-1API 754API 576API 689API 755ISO 14224:2016ISO 20815:2018IEC 61511:2016ISO 31000:2018
6Derived Analysis (seeded from this FM)
9/4/4FMEA Sev/Occ/Det
0.34RBI λ
0.8Monitor pdet
4 月Insp. int.
Current tasks:每3个月目视检查叶片表面 | 每6个月磁粉或渗透检测 | 连续振动监测
RCFA incident:AC-201A 发生叶片疲劳裂纹，严重程度 9，后果类型 Operational
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task无损检测(UT/MT/PT) 监测裂纹萌生, 关键转动件定时拆检; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理
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=fatigue; vibration
Governing standardsAPI 579API 612API 670API 684ASME VIIIISO 10816
⚠ 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。