--- title: "ORO.TC.100 – ORO.TC.140: SUBPART TC: TECHNICAL CREW IN HEMS, HHO OR NVIS OPERATIONS (Part-ORO) — rule index · Avioverse" description: "ORO.TC.100 – ORO.TC.140, Regulation (EU) No 965/2012. This Subpart establishes the requirements to be met by an air operator when operating an aircraft…" url: "https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc" --- # SUBPART TC: TECHNICAL CREW IN HEMS, HHO OR NVIS OPERATIONS ANNEX III (Part-ORO) · Air Operations · Regulation (EU) No 965/2012 · ORO.TC.100 – ORO.TC.140 On this page 1. ## [ORO.TC.100 Scope](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-100) This Subpart establishes the requirements to be met by an air operator when operating an aircraft with technical crew members in commercial air transport… 2. ## [ORO.TC.105 Conditions for assignment to duties](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-105) Technical crew members involved in commercial air transport HEMS, VEMS, HHO or NVIS operations shall only be assigned duties provided they: [AMC1 ORO.TC.105 Conditions for assignment to duties](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-105#amc1-oro-tc-105) 3. ## [ORO.TC.110 Training and checking](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-110) The operator shall establish a training programme in accordance with the applicable requirements of this Subpart to cover the duties and responsibilities… [AMC1 ORO.TC.110 Training and checking](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-110#amc1-oro-tc-110) [AMC2 ORO.TC.110 Training and checking](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-110#amc2-oro-tc-110) [AMC1 ORO.TC.110(a) Training and checking](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-110#amc1-oro-tc-110-a) 4. ## [ORO.TC.115 Initial training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-115) Before undertaking the operator conversion training, each technical crew member shall complete initial training, including: [AMC1 ORO.TC.115 Initial training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-115#amc1-oro-tc-115) 5. ## [ORO.TC.120 Operator conversion training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-120) Each technical crew member shall complete: operator conversion training, including relevant CRM elements, (1) before being first assigned by the operator… [AMC1 ORO.TC.120 ;125 Operator conversion training and differences training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-120#amc1-oro-tc-120) [AMC2 ORO.TC.120 &.125 Operator conversion training and differences training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-120#amc2-oro-tc-120) 6. ## [ORO.TC.125 Differences training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-125) Each technical crew member shall complete differences training when changing equipment or procedures on types or variants currently operated. 7. ## [ORO.TC.130 Familiarisation flights](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-130) If the operator conversion training does not include training in an aircraft/FSTD, each technical crew member shall undertake familiarisation flights. 8. ## [ORO.TC.135 Recurrent training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-135) Within every 12-month period, each technical crew member shall undergo recurrent training relevant to the type or class of aircraft and equipment that… [AMC1 ORO.TC.135 Recurrent training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-135#amc1-oro-tc-135) 9. ## [ORO.TC.140 Refresher training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-140) Each technical crew member who has not undertaken duties in the previous six months shall complete the refresher training specified in the operations… [AMC1 ORO.TC.140 Refresher training](https://avioverse.aero/regulations/easa/air-ops/part-oro/subpart-tc/oro-tc-140#amc1-oro-tc-140) Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use. Share [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Favioverse.aero%2Fregulations%2Feasa%2Fair-ops%2Fpart-oro%2Fsubpart-tc)[X](https://twitter.com/intent/tweet?url=https%3A%2F%2Favioverse.aero%2Fregulations%2Feasa%2Fair-ops%2Fpart-oro%2Fsubpart-tc\&text=SUBPART%20TC%3A%20TECHNICAL%20CREW%20IN%20HEMS%2C%20HHO%20OR%20NVIS%20OPERATIONS%20%E2%80%94%20Air%20OPS)