Mangala Daily Superfast between Ernakulam Junction and Hazrat Nizamuddin is undergoing phased upgradation in order to operate with modern LHB(Linke Hoffman Busch) coaches, replacing conventional ICF(Integral Coach Factory) coaches.
Train No. 12617 Ernakulam Jn. – Hazrat Nizamuddin Mangala Superfast, 3rd rake(train with notified coach composition) leaving Ernakulam Jn. on Saturdays will be upgraded to LHB from today(18th December, 2021) onwards and the fourth rake will be upgraded to LHB coaches on Fridays from 31st December, 2021. In the return direction, Train No. 12618 Hazrat Nizamuddin – Ernakulam Jn. Mangala Superfast leaving H.Nizamuddin on Tuesdays from 21st December, 2021(3rd rake) and Mondays from 03rd January, 2022(4th rake) will be upgraded to LHB.
Revised LHB Coach Compostion for 12617 on Fridays from 31st December, 2021 and 12618 on Mondays from 03rd January, 2022.
Two AC 2-tier, Six AC 3-tier, Eight Second Class Sleeper, Three Second Class General(Reserved), One Pantry Car, Two Generator cum Luggage/Brake Van Coaches.
TIMELINE OF 12617/12618 LHB UPGRADATION
| Phase | Train | Days | Date from which LHB coaches were introduced. | Rakes |
| 1 | 12617 Ernakulam Jn. – H.Nizamuddin Mangala Express | SundayMonday | 12.12.202113.12.2021 | 1St Rake2nd Rake |
| 12618 H.Nizamuddin – Ernakulam Jn. Mangala Express | WednesdayThursday | 15.12.202116.12.2021 | 1St Rake2nd Rake | |
| 2 | 12617 Ernakulam Jn. – H.Nizamuddin Mangala Express | Saturday | 18.12.2021 | 3rd Rake |
| 12618 H.Nizamuddin – Ernakulam Jn. Mangala Express | Tuesday | 21.12.2021 | 3rd Rake | |
| 3 | 12617 Ernakulam Jn. – H.Nizamuddin Mangala Express | Friday | 31.12.2021 | 4th Rake |
| 12618 H.Nizamuddin – Ernakulam Jn. Mangala Express | Monday | 03.01.2022 | 4th Rake | |
| Rest of the 3 days Train Nos.12617/12618 will continue to operate with ICF coaches which will be upgraded to LHB Coaches later. |