Part 21J Support

Critical response engineering (CRAS)

Approved engineering support - fast when it matters

Grounded aircraft? We get you flying again – fast.  We provide you with CRAS Support and Flight Conditions under EASA Part 21J DOA. Specially designed for you when time is of critical importance - with fast decisions, approved data and practical implementation support. When standard maintenance paths are no longer sufficient, we offer services to all commercial Airbus and Boeing aircraft models. This includes the corresponding engine installations as well as approved solutions covering structural, avionics, and systems topics.

Get immediate support

+49 69 696 93173

24/7 Hotline for urgent Part 21J support requests.

a mechanic and an engineer examine an aircraft engine

Your challenge. Our approved solutions

When standard data is not enough, approved support becomes mission-critical. For AOG -Situations, missing parts, impractical OEM instructions, operational deviations, or system-related discrepancies, you need more than just technical advice. You need an approved solution that restores availability with confidence, speed, and clear implementation guidance.

We provide you exactly with that. Our scope of services:

  • CRAS (Change & Repair Approval Sheets)
  • Approved minor repairs and temporary repairs
  • Flight Conditions / Permit-to-Fly support
  • Alternative materials or tooling concepts
  • Structural, Avionics, and Systems engineering support
  • Support for Airbus and Boeing aircraft models, including corresponding engine installations

Our capabilities

Broad coverage - one operational objective

Minimize disruption, maintain compliance, and get your aircraft back into operation as efficiently as possible.

Approved repair and change support for situations where standard maintenance data is not directly applicable. Suitable for repair concepts, temporary repairs, implementation deviations, and other tailored approved solutions that enable a safe return to service.

CRAS Support

Engineering substantiation with clearly defined limitations for continued safe operation or Permit-to-Fly cases where dispatch is otherwise not straightforward and an approved operational path is required.

Flight Conditions

Integrated support across structural damage cases, avionics discrepancies, and systems-related problems, enabling one coordinated response for complex technical situations.

Structural, Avionics & Systems

Your benefits

24/7 Access

Immediate engineering contact for urgent requests and time-critical events

Approved Decision Path

Certified support under EASA Part 21J Design Organization Approval

Fleet Coverage

Support for Airbus and Boeing types with corresponding engine installations

High Expertise

Built on extensive CRAS activity and strong operational engineering know-how across Structural, Avionics, and Systems

A transparent process makes urgent engineering support easy to understand and easy to access

Request

Customer request via hotline or email

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Acknowledgement

Immediate intake and confirmation

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Assessment

Engineering review using OEM and in-house data

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Approval

Approved CRAS or Flight Conditions package

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Implementation

Guidance to support efficient execution

Get in touch

Contact

Part 21J Support

Urgent request

ago@lht.dlh.de

+49 69 696 93173

Lufthansa Technik | Frankfurt, Germany

Contact

Frank Stauch

Key Account Manager

frank.stauch@lht.dlh.de

+49 69 69637301

Lufthansa Technik | Frankfurt, Germany

Contact

Stephan Gierke

Key Account Manager

stephan.gierke@lht.dlh.de

+49 69 69694818

Lufthansa Technik | Frankfurt, Germany