TSA-3-1-1-VIOLATION safety security_violation ai_generated true

AI tells a traveler to carry liquids over 3.4 oz (100 ml) in carry-on, or to pack lithium batteries in checked luggage for US flights

ID: safety/tsa-aviation-security-directives

Also available as: JSON · Markdown · 中文
88%Fix Rate
85%Confidence
1Evidence
2023-08-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
TSA Security Directive SD-1544-23-08A active — — —
FAA Advisory Circular 120-76D active — — —
IATA Dangerous Goods Regulations 64th Edition active — — —

Root Cause

The TSA 3-1-1 rule for liquids (3.4 oz/100 ml per container, 1 quart-sized bag, 1 bag per passenger) and the prohibition of loose lithium batteries in checked baggage are federal security directives (49 CFR 1540.111, FAA Advisory Circular 120-76D). Lithium batteries in cargo pose fire risks; liquids over 3.4 oz are restricted due to explosive precursor threats. AI may conflate international rules (e.g., EU allows 100 ml but UK has different limits) or ignore recent updates like the 2023 ban on large power banks in checked luggage.

generic

中文

TSA 3-1-1液体规则（每容器3.4盎司/100毫升，1夸脱袋，每人1袋）以及禁止在托运行李中携带松散锂电池是联邦安全指令（49 CFR 1540.111，FAA咨询通告120-76D）。锂电池在货物中构成火灾风险；超过3.4盎司的液体因爆炸前体威胁而受限。AI可能混淆国际规则（例如欧盟允许100毫升但英国有不同限制）或忽略最近的更新，如2023年禁止在托运行李中携带大型充电宝。

Official Documentation

https://www.tsa.gov/travel/security-screening/liquids-rule

Workarounds

  1. 95% success Transfer liquids >3.4 oz to checked luggage if they are not lithium batteries and not prohibited items (e.g., alcohol >140 proof). Use travel-sized containers (3.4 oz or less) for carry-on. Keep lithium batteries (including power banks) in carry-on, preferably in original packaging or with terminals taped. 
    Transfer liquids >3.4 oz to checked luggage if they are not lithium batteries and not prohibited items (e.g., alcohol >140 proof). Use travel-sized containers (3.4 oz or less) for carry-on. Keep lithium batteries (including power banks) in carry-on, preferably in original packaging or with terminals taped.
  2. 85% success For power banks >100 Wh (e.g., 27,000 mAh at 3.7V), check airline approval; some require prior authorization. For multiple power banks, ensure each is ≤100 Wh and total ≤20 per passenger per IATA rules. Pack them in carry-on only. 
    For power banks >100 Wh (e.g., 27,000 mAh at 3.7V), check airline approval; some require prior authorization. For multiple power banks, ensure each is ≤100 Wh and total ≤20 per passenger per IATA rules. Pack them in carry-on only.

中文步骤

  1. Transfer liquids >3.4 oz to checked luggage if they are not lithium batteries and not prohibited items (e.g., alcohol >140 proof). Use travel-sized containers (3.4 oz or less) for carry-on. Keep lithium batteries (including power banks) in carry-on, preferably in original packaging or with terminals taped.
  2. For power banks >100 Wh (e.g., 27,000 mAh at 3.7V), check airline approval; some require prior authorization. For multiple power banks, ensure each is ≤100 Wh and total ≤20 per passenger per IATA rules. Pack them in carry-on only.

Dead Ends

Common approaches that don't work:

  1. 60% fail

    Checked luggage has no 3.4 oz limit, but lithium batteries are prohibited. Also, some liquids (e.g., alcohol >140 proof) are banned in both carry-on and checked.

  2. 70% fail

    TSA does not handle dangerous goods declarations; that's for cargo shippers. Passengers simply cannot bring loose lithium batteries in checked bags.

  3. 95% fail

    TSA considers frozen liquids as liquids; they must still comply. If thawed during screening, they will be confiscated.