concerns have been raised by staff and technician. One of the feedback was related to an accident that occurred during energized power causing a small flash over to the transformer however, without causing any injuries. It was also found that, any risks arising from electrical maintenance work were thought to be common risks associated with the field of work by the technicians and the presence of danger had been compromised without any proper source of guidelines. This is due to hazard identification and risk assessment are not sufficiently introduced in a basic level of work. 1 The risk identified from data collection Type of Risk Rating No. Description *L *S Risk/Hazard (*Lx*S) Medium 1. Expose to unguarded moving mechanical part 2 3 (6) Medium 2. Integrity of Scaffold Scaffolding topple 2 3 – (6) Medium 3. Hand expose with the sharp object 3 2 (6) Moving vehicle Hit by a moving vehicle during High – 4. 4 4 working on scissors lift (16) Medium 5. Loose tools falling object on road user 4 3 – (12) Moving vehicle Hit by moving vehicle while High – Safety 6. 4 4 setting up Traffic Management Plan (TMP) (16) (Acute Impact) Integrity of Fire Fighting System - Alarm system in High 7. the tunnel also not synchronize with the control 3 5 (15) room Flash Over/ Arc Flash during switch over High 8. 3 5 transformer (15) Unsafe Act due to the staff and contractor High 9. intended to cross the highway on live traffic Hit 4 4 – (16) moving vehicle while road crossing Diesel Filter compartment in USP Control Medium 10. Room caught on fire No warning sign of 2 4 – (8) fire hazard High 1. Confined Space 4 4 (16) Health High (Chronic 2. Unknown airborne dust 4 5 (20) Impact) Inappropriate PPE due to unknown High 3. 4 4 airborne dust (16) *L : Likelihood * S : Severity Fig. 3. Bow-Tie Model develop based on critical risk of unknown airborne dust hazard and confined space Conclusion This study focuses on the feedback given by the maintenance technicians in tunnel maintenance work of Menora Tunnel, Perak. It was found that all maintenance technicians were exposed to certain risks depending on the level of risk exposure itself. Based on the identified critical risks,
concerns have been raised by staff and technician. One of the feedback was related to an accident that occurred during energized power causing a small flash over to the transformer however, without causing any injuries. It was also found that, any risks arising from electrical maintenance work were thought to be common risks associated with the field of work by the technicians and the presence of danger had been compromised without any proper source of guidelines. This is due to hazard identification and risk assessment are not sufficiently introduced in a basic level of work. 1 The risk identified from data collection Type of Risk/Hazard No. Description *L *S Risk Rating (*Lx*S) Safety (Acute Impact) 1. Expose to unguarded moving mechanical part 2 3 Medium (6) 2. Integrity of Scaffold – Scaffolding topple 2 3 Medium (6) 3. Hand expose with the sharp object 3 2 Medium (6) 4. Moving vehicle – Hit by a moving vehicle during working on scissors lift 4 4 High (16) 5. Loose tools – falling object on road user 4 3 Medium (12) 6. Moving vehicle – Hit by moving vehicle while setting up Traffic Management Plan (TMP) 4 4 High (16) 7. Integrity of Fire Fighting System - Alarm system in the tunnel also not synchronize with the control room 3 5 High (15) 8. Flash Over/ Arc Flash during switch over transformer 3 5 High (15) 9. Unsafe Act due to the staff and contractor intended to cross the highway on live traffic – Hit moving vehicle while road crossing 4 4 High (16) 10. Diesel Filter compartment in USP Control Room caught on fire – No warning sign of fire hazard 2 4 Medium (8) Health (Chronic Impact) 1. Confined Space 4 4 High (16) 2. Unknown airborne dust 4 5 High (20) 3. Inappropriate PPE due to unknown airborne dust 4 4 High (16) *L : Likelihood * S : Severity Fig. 3. Bow-Tie Model develop based on critical risk of unknown airborne dust hazard and confined space Conclusion This study focuses on the feedback given by the maintenance technicians in tunnel maintenance work of Menora Tunnel, Perak. It was found that all maintenance technicians were exposed to certain risks depending on the level of risk exposure itself. Based on the identified critical risks,
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